Question

4. A mixture of 40 litres of milk and water con
tains 10% water. How much water must be
added to make 20% water in the new solution?
(A) 10 litres (B) 8 litres
(C) 12 litres (D) 5 litres​

Answer 1

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Answer 2

$\huge\mathfrak\blue{Answer}$

Mixture of 40 liters of milk=36M and 4W(Ratio is 90:10)

Now the New mixture shall be in the ratio of 80:20

Now water shall be added but milk shall not be touched

therefore 80% is equivalent to 36

100% is (36/80)*100=45

Thus water shall be added=(45-36-4)=5 liters of water