Question

A mixture of 40 litres of milk and water contains 10% water. How much water should be added to this so that water may be 20% in the new mixture?

• A. 6.5 litres
• B. 5.5 litres
• C. 4 litres
• D. 5 litres

Answer 1

Answer: (D)

5 litres

Answer 2

Mixture of 40 liters
Milk = 36
Water = 4
Let x amount of water be added, so
$4 + x = \frac{20}{100} (40 + x)$
Solving for x, we get
x = 5 liters

Therefore, the correct option is (D): 5 liters