Question : A canister holds 36 litres of a mixture of milk and water in a ratio of 3 : 1. 15 litres of milk is added to the canister. The new ratio of the mixture is:
Option 1: 12 : 5
Option 2: 14 : 3
Option 3: 7 : 4
Option 4: 9 : 4
Correct Answer: 14 : 3
Solution :
Given: A canister holds 36 litres of a mixture of milk and water in a ratio of 3 : 1.
Quantity of milk = $\frac{3}{4} × 36 = 27$
Quantity of water = $\frac{1}{4} × 36 = 9$
After adding 15 litres of milk,
$\therefore$ New ratio $=(27 + 15):9 = 42:9 = 14:3$
Hence, the correct answer is 14 : 3.
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