Holiday Homework

Holiday Homework (summervacation)

VIl A

KENDRIYA VIDYALAYA IFFCO PHULPUR ALLAHABAD

MODEL/PROJECT WORK

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CHAPTER-1

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Case-Study 1 Socially Responsible Behaviour

Two hundred students have come to appear in standard X, board examination. Out of total

200 candidates, 120 are girls. Their board roll numbers begin from 12,34,201. The roll

number series contains first, girls roll numbers, followed by that of boys. All the students

have reached the entry gate of the school by school buses and are standing in 10 queues.

The physical distance between any two candidates is 2 m. In order to ensure Covid-19

appropriate behaviour, two guards on duty at the entry gate are sending them inside, roll

number-wise, in the group of 20, each. It takes three minutes for each group to enter inside

the school. Each group is entering school premises with gap of 1 minute. The first group

enters at 1:10 p.m. Before, allowing their entry, the guards check their body temperature. When the body temperature of the child is found to be correct, he/ she is allowed entry.

Based on the above information answer the following questions by choosing the correct

option from the given four options in each question:

(i) The entry time of last group of girls was

(a) 1:30 p.m. (b) 1:32 p.m. (c) 1:40 p.m. (d) 1:30 a.m.

() The entry time interval of the boy having roll number 12,34,380 was

(6) 1:43 p.m. - 1:45 p.m.

(d) 1:42 p.m. - 1:45 p.m.

(a) 1:42 p.m. - 2:45 p.m.

(c) 1:42 a.m. - 1:45 p.m.

i) The total physical gap maintained between the students of any queue was

(d) 34 m (a) 40 mn (b) 56 m (c) 38 m

(iv) With every group having entered inside, the guard marks 20', in his visitor's book.

The sum of entries made by him when the fourth group is about to enter is

c) 78 (d) 45 (a) 12 (b) 60

(u) The body temperature of each child was recorded to be 98.6° C. The seventh multiple

of numerical value of this temperature is

(c) 690.2 (d) 234.5 (a) 123.4 (6) 678.4

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Self Help Case-Study 2

Three class mates Anand, Shekhar and Najakat having roll numbers 23, 46 and 92

respectively, who live in a hostel, have fixed the following rules to distribute duties, among

themselves.

Rulel: Month number of the current date will be subtracted from the roll number, 5

times. If the answer is positive, he/they will have duty to clean the room, that day

Rule 2: The roll number will be divided with the current week day number. Ifthe remainder

is one, the concerned student will wash the clothes.

Rule 3: Sum of date and month number of the current date will be added to the ro number. If this sum becomes equal to the roll number of the student, he wall be

giving party to his friends.


option from the given four options in each question: )Today is September 11, 2022.The student on duty to clean the room is

(a) Anand and Najakat(c) Najakat

(6) Shekhar

(d) Shekhar and Najakatiz) On Friday the student on duty to wash the clothes i8 (a) Najakat

(6) Shekhar (c) Anand (ii) On 11-12-2022 the boy on duty to arrange week

(d) None of these

(a) Anand DoY on duty to arrange week end party is

(6) Shekhar(c) Najakat(iv) From the given list, the students with roll numbers to D

(a) Anand and Najakat (c) Anand and Shekhar

roll numbers to be added to get multiple of 5are

(6) Shekhar and Najakat

(d) None of these

d) None of these

(w) Shekhar's mother comes to meet his child in the hostel. She brings 100 pieces or Sweets 1or him. Shekhar decides to share it with his friends, for each, equal to tne number of pieces, same as H.C.F. of all the three roll numbers. Total number o sweets shared with Anand and Najakat is: (a) 67 (b) 46 (c) 34 (d) 47 Answer

(i)

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Case-Study 3 Critical Thinking

Fifty-one security personnel are on duty for the security of a cabinet minister. In order to

maintain secreey, they have been issued code numbers -25 to 25. At a time only 12 or a smaller number of guards remain on duty. The daily duty list is sent to these personnel in

the form of a mathematical expression.



(2) Security personnel with code number; 'one minus the negative multiples of 10' will

be on duty. The duty list contains code numbers

(a) 11,21 (6) 23, 89 (c) 23, 78 d)12, 56

ii) Five security personnel with code numbers as multiples of 4, when added, give sum -60 will be on duty. The duty list is

give sum (a)-20, 16, -12,-8,-4

(c) 20,-16, -12, -8, -4 (b)-20,-16, -12,-8, -4 (d)-20,-16, -12, -8,4

iii) Two security personnel with code numbers such that one code is fase

three and one code divided by other gives-1 as quotient, o appliedTourth

for multinla

leave. .. th multiple of

The code numbers of the applicants were

(6) 14,-14 (c) 12,-12 d) 8,-8 nel with code number = 4 (4-0, was awarded for showing best alertnea.

(a) 24,-24

His code is

(b) 12 (c) 11 d) 33 (a) -12 (G) A security personnel with code number = 100 + 100 x 10, gave his life for saving life

of the cabinet minister. His code is

(6) 100 (c) 200 (d) 10 (a) 1,000

Answer

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EmpathyCase-Study 4

There are 43 houses in a colony with house number 1 to 43. Their guard has gone on

nedical leave tor one month. As a security measure, they have decided to perform guard med

duty uty, themselves. A team with mathematical mind, has been framed to generate number

some formulator assigning duty, every day. The number obtained as output from the formula will be the house number of the owner / member of the house that will perform

night duty.


option from the given four options in each question: ppt

() The house number = 2 (23 + 25) - 60, will be on duty, Monday night. The house on duty is:

(a) 46 (6) 36 (c) 56

(i) The house number = (3 +7) (4 - 2), will be on duty, on Saturday. The house on duty

(d) 78

is

(a) 20 (b) 35 (c) 80 (iii) As a goodwill gesture, the Dyawan with house number = (-2) (-3) (-4) (-1) has

promised to provide tea to the person on duty. The house number of Dyawan is

(d) 12

(a) 24 (b)-24 (c) 20 (d) 12 (iv) The guard re-joins duty after one month. The contributory amount = 7(-4,00,000 (-10)) that otherwise, could have gone to some other guard, if employed, is being given to the guard, as salary for the leave period. He is also given 10,000 as token of respect. The total amount received by guard is

(a) 60,000

(u) The total medical bill of the guard for the ailing period of one month was 32,800. The surplus amount left with the guard from the money received as in part (iv) after meeting the medical expense is

(a)17,20

The

6) 70,000 (c) T 50,000 (d) 5,00o

(6) 18,200 (c) R 17,200 d) 37,200 Answer

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Performance Appraisal

Case-Study 5

A municipal committee has completed one year of its tenure. The chairman of the

committee has asked people to evaluate its performance by assigning marks in the scale

-2 to + 2. The residents of the area have made a sample of 200 men, women each to give

their feedback. Following is the detail of feedback given below by men and women.

S. no. Marks awarded Number of men

18 1 -2 2 -1

24

12 0

1 34

2 112

S. no. Marks awarded Number of women

1 -2 23

29 2

3 0 14

4 1 46

5 2 88



(i) The number of men and women who gave -2 as feedback are

(a) 41 (6) 45 (c) 23 (d) 89

(i) Total number of marks given by men and women with 2 as feedback are

(a) 200 (6) 400 c) 600 d) 900

(ii) The total number of negative marks assigned by all men are

(a) -60 (6)-40 c)-24 (d)-80

(iv) Total marks assigned by all the men are

(b) 498 (a) 198 (c) 298 (d) 345

(v) The number of women who did not assign negative marks are

(a) 345 (6) 879 (c) 148 (d) 123

Answer

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CHAPTER-2

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2 Fractions and Decimals

Critical Thinking

1. An electric lamp was charged forhours. It continued to glow for one fourth of theecharging time. What was the glow time of the lamp, in hours?

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2. A roadside Dhaba provides lunch at the rate 7 80 per plate. He has facility of half plate, also, at the half rate. A family has placed order for four and half plates, lunch.What is the amount of bill to be paid?

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3. In a festival, 180 men had come. The number of women attendees was half the number of men. The number of children attendee was one sixth the number of men. How many total numbers of men, women and children attended the festival?

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Science

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Eliminate Poverty There are 1125, ration card holders, in village. Out of these 125 are in the BPL (Below Poverty Line) category. For a family to be included in the BPL category, the family should have monthly income less than 2500. The average monthly income of a non-BPL family,in the village is 20,000. The average monthly income of a BPL family, in the village is 2,000. The total population of the village is 7,875. The government provides 5 kg of free wheat per person of the BPL family, every month.Based on the above information answer the following questions by choosing the correctoption from the given four options in each question:) The fraction of the ration cards belonging to BPL families are (a) (6)

(d) 36 (ü) The average number of family members in a family are (a) 3 (6) 4

(c) 8 (d) 7

() 'The fraction of monthly income of BPL family of the monthly income of non-BPLfamily is (a)

(6) (d) 0) The wheat distributed by the government to the BPL families in a month is

(a) 5,648 kg 0) 20 BPL families have decided to work hard in order to raise their respective monthly

ncome to 10,000. The decimal fraction obtained by using original monthly incomeas dividend and expected income as divisor is (a)

(6) 4,375 kg (c) 5,665 kg (d) 4,354 kg

(b) d)

Answer

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Case-Study 2 Covid-19: Testing Saves Life

In a school, to test the presence of Covid-19 virus, random sampling of 200 children

was done. Out of these, 15 children were found to be positive. As there were no serious

symptoms among those found positive, they were asked for home quarantine, for 14 days

period. As on 10th day, 5 children from among 15 found positive, developed symptoms,

they were hospitalised. After being found clinically fit, they were discharged (after threedays stay in the hospital).



) The fraction of the children found covid positive in the random sampling were

(a) 6) d)

(i) The fraction of the children who remained in 14 days, home quarantine, of the tot

sample collected is 10

(d) (a) (6) 20 40

The fraction of the children hospitalised, of the total samples collected were

a) 20 d) (iv) )The fraction of the days spent in hospital as divisor and their home quarantine

period as dividend is

(a) 10 3 )During sampling process, one paramedical, on an average, took sample of one eighth

of total samples collected. The number of paramedical on duty were (a) 23 (6) 12 (c) 45 (d)25

Answer

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Case-Study 3 Labour Rights

a nosiery unit, there are 200 employees. Normal working hours of an employee are In

the 8 hours The daily wages of an employee for normal duty are ? 800. Overtime is paid, at

the rate, tw E rate, two times the normal wages/nou

Based on the above information answer the following questions by choosing the correctoption from the given four options in each question: () On Monday, 190 employees were on duty. The fraction of employees on duty were (6) 19

40 (a)

(d) 19 20

(c)

(ii) Diwakar did overtime of 3 hours daily, for three days. The fraction made by taking the number overtime wages as numerator and wages of normal time during these three days, as denominator is

(a) (6) d 3

(iii) Swabhiman attends normal duty for the month of December (all holidays off but paid). His total wages for December are (in ) are

(a) 24,800 iv) The employer decided to distribute 500 sweaters among the needy children, in a

nearby school. To maintain dignity of the recipients, one fourth of the selling pricewas charged from them. If the selling price per sweater was 400, the fraction of the selling price of a sweater to a needy child, of the discount as divisor is

(6) 45,000 (c) 35,900 (d) 23,450

(a) (d)

(o) One employee, met with acident on the work place. He had to be admitted in the

hospital for three days, till he recovered. He was given paid leave for this period.The employer paid him 7 5400 which included wages and payment for medical bill

also, that was 3,000. The decimal fraction of total payment received with medical

expenditure as denominator is

(a) 2.4 (6) 1.8 c) 3.8 (d) 7.1

Answer

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Save Environment Case-Study 4

forest area was cleaned to set up factories. The total industrial area marked was

100 sq. km. In order to compensate for the environmental loss and inconvenience caused

to forest animals, the 20, factory owners, took the following steps:

1. 500 trees were planted, along the newly constructed roads, in the industrial area.

2. Watering troughs, numerically equal to half the number of sq. kms of the area of forest

cleaned, were made in the surrounding jungle area for animals to drink water.

3. 0.06 percent of their yearly profit will be used for plantation and care of jungle area

only.

5ased on the above information answer the following questions by choosing the correct


lf one tree occupies 10 sq. m of area, the total forest cover created in the industrial

(d) 6,700 m2

area is (c) 5,000 m2

(6) 5,050 m*

(a) 6,000 m

(ii) If one

wateringtrough

occupies9 m2 of area, the total aro.

(in m)

h OCCpies 9 m" of area, the total area occupied by these-

(6) 450 (c) 245 d) 453

(a) 345 arned ? 50,00,000 as yearly profit. The amount (in ). it will be

Cii) A blanket

factory

earned b0,00,000 as yearly profit. The

spendingon

plantation

and care of forest area is

(6) 3,800 (c) 2,300 (d) 4,000

(iv) A water

tank has been

arrangedto fill the watering troughs two times

fill the watering troughs two timesa day. T litres. The total water being illed in (a) 3,000

capacity of one is wateringtrough is 543.5 litres. The total water

these watering

troughs daily is

(a) 64,350L

(6) 54,343L(c) 54,365 L (d) 34,524 L

() The regularand contract

employees of sports tactory have made a group to heln the actory have made a group to help th

for this purpose.

injuredanimals. The regular employee puts aside, 7 150 per month, for this purt

The contract

employeewill be contributing one sixth of normal contribution. The

monthlycollection by l7 regular and 8 contract employees, done for this noble cause

ution. The

ise

is (a) 73,750

(6) T 2,570 (c) T 2,650 (d) 2,750

Answer

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HOLIDAY HOME WORK (2022-23)

SCIENCE

CLASS VII

Sl

No.

Question/ Instructions

1

Prepare a colourful chart ( use A4 sheets) on any two of the following-

(i) Human digestive system (fig. 2.2)

(ii) Arrangement of teeth and different types of teeth (fig. 2.3)

(iii) Feeding and digestion in Amoeba (fig. 2.10)

2

Find out and write the names of various insectivorous plants that grow in our country.

Make a colourful well labelled diagram of any one of them.

3

Prepare colourful charts (use A 4 sheets) on any two from each group –

Group A- ( any two from the following)

(i) Human respiratory system (fig. 10.4)

(ii) Breathing organs in fish (fig. 10.10)

(iii) schematic diagram of circulation (fig 11.3)

Group B- ( any two from the following)

(i) section of human heart (fig. 11.4)

(ii) human excretory system (fig. 11.6)

(iii) Reproduction through spore formation in fungus (fig 12.7)

4

Prepare a table showing the names of Acids and bases and in which substances these

are found.

5

Write the meaning of the following terms-

(a) Stomata (g) Pseudopodia

(b) Saprotrophs (h) Food vacuole

(c) Digestion (i) Heat insulator

(d) Tooth decay (j) Heat conductor

(e) Assimilation

(f) Rumen

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