Question
General Aptitude Question on Ratio
In an 80-litre mixture of milk and water, the ratio of milk to water is 7 : 3. To make this ratio 2 : 1, how many litres of water should be added?
A
5 litres
B
6 litres
C
4 litres
D
10 litres
Answer
10 litres
Explanation
Solution
In the original mixture, milk is 7/10 × 80 = 56 litres and water is 80 − 56 = 24 litres. To achieve a 2 : 1 ratio, we set up the equation 56/(24 + x) = 2. Solving for x, we find x = 10 litres.