SSC CGL 11 Aug 2017 Shift 1 Paper

Question : 58 of 100

Marks: +1, -0

How much water (in litres) much be added to 80 litres solution of milk and water containing 10% milk, so that it becomes a 5% milk solution ?

Solution:

The quantity of milk in the mixture =

80× 10/100=8

litres
The quantity of water in the mixture = 80 - 8 = 72 litres
Let x litres water should be add.
According to the question,

8/{72+x}=5/(100-5)

⇒

8× 19 = 72 + x

∴

x = 152 - 72 = 80

litres

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