A vessel contains 56 litres of mixture of milk and water in the ratio 5 : 2. How much water should be mixed with it so that the milk to water ratio becomes 4 : 5.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 34 litres
Ratio of Milk to water in original 56 litres mixture = 5 : 2
Milk = $\frac{5}{7}×56=40$
Water = 16
Let x be litres of water to be added
$\frac{40}{x+6}=\frac{4}{5}$
$200=4x+64$
$136=4x$
$x=34$