90 litres of a mixture of milk and water contains 20 water How much water should be added so that th...........

Quant (SSC) Mixture and Alligation

90 litres of a mixture of milk and water contains 20% water. How much water should be added so that the mixture has 28% water ?

18litres

12litres

10litres

8litres

Quantity of water = 90*20/100 = 18
18+x/90+x = 28/100
1800+100x = 2520+28x
72x = 720
X = 10 litres
Hence, option 3 is the correct answer.

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