Mathematical Puzzles
Hard
2 min
A can contains 60 litres of a mixture of milk and water in the ratio 2:1. How much water must be added to make the ratio 1:1?
Hint
Find the initial amount of milk and water.
Answer
20 litres.
Explanation
The mixture contains 40 litres of milk and 20 litres of water. To make them equal, 20 litres of water must be added.
Step-by-Step Solution
Milk = 60 × 2/3 = 40L.
Water = 60 × 1/3 = 20L.
Additional water = 40-20 = 20L.
Water = 60 × 1/3 = 20L.
Additional water = 40-20 = 20L.