A mixture contains milk and water in the ratio of 5 : 3, respectively. On adding 7 litres of water, the ratio of milk to water becomes 1 : 2. Find the quantity of milk in the mixture.
Answer & explanation
Correct answer: option 3
Initial mix ,
M : W = 5 : 3, ..(1.)
After adding 7 litre water,
M : W = 1 : 2, ..(2.)
So, making the unit of milk in both ratios same,
we multiply eq. (2.) with 5,
(1 : 2) x 5 = 5 : 10,
Difference between and initial and after quantity of water = 10 - 3 = 7,
Therefore, 7 units = 7 litres,
1 unit = 1 litre,
Hence, quantity of milk is = 1 x 5 = 5 litres.