Ravi Ranjan Mahendras @raviranjanraj15

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A man has 90 pens. He sells some of these at a profit of 15% and the rest at 9% profit. On the whole transaction he gets a profit of 11%. How many pens did he sell at 9% profit ?

In what ratio must water be added to milk to gain 25% by selling it at a cost price ?

A man has Rs 15000 lent out in two part , one at 5% p.c.p.a. another at 8% p.c.p.a. after 3 years they earn a simple interest of Rs 2700. Then how much money was lent at 5% p.c.p.a.?

A man travelled a distance of 80 km in 7 hours partly on foot at the rate of 8 km/hr and partly on bicycle at 16 km/hr. Find the distance travelled on foot ?

Ex: A bowler’s bowling average is 12.4 . In the next match he took 5 wickets after giving 26 runs , therefore his total average is decreased by 0.4. What is his total wickets till last match .

Two vessel contain petrol and kerosene in the ratio 7 : 3 and 1 : 4. In

what ratio should both vessel is mixed so that the mixture contain petrol

and kerosene in the ratio 3 : 2?

A mixture contains wine and water in the ratio 5 : 1. On adding 5 litre of

water, the ratio of wine to water becomes 5 : 2. The quantity of wine in

the mixture is ?

Two alloys are both made up of copper and tin. The ratio of copper and tin in the first alloy is 1 : 3 and in the second alloy is 2 : 5. In what ratio should the two alloys be mixed to obtain a new alloy in which ratio of tin and copper be 8 : 3?

The ratio of land to water on the whole of the earth is 1:2 and it is 2:3 on the northern hemisphere. The ratio of land to water on the southern hemisphere-

Concept of many time replacement

A container contain x litres milk , y litre milk was taken out and replaced by water, this process is repeated two times more find how much milk is now rest?

Ex: A container contain 80 litre milk , 8 litre milk was taken out and replaced by water, this process is repeated two times more find how much milk is now rest?

8 liters are drawn from a cask full of wine and is then filled with water. This operation is performed three more times. The ratio of the quantity of wine now left in cask to that of the water is 16 :65. How much wine did the cask hold originally ?