Question

A mixture (40 litres) contains tonic and water in the ratio 3 : 1 to make the ratio 2 : 1, how much additional amount of water is required?

• A. 5 litres
• B. 4 litres
• C. 3 litres
• D. 2 litres

Answer 1

Answer: (A)

5 litres

Answer 2

Given that the Mixture of tonic and water contain:
Tonic = 30l
Water = 10l
Now, quantity of water = 10 + x (let x be added)
10 + x = $\frac{1}{3}$ × (40 + x)
By simplifying the equation, we get
x = 5 litres.
The correct option is (A)