Correct Answer - Option 2 : 125 litres
Given:
Pipe A can fill the tank = 20 minutes
Pipe B can fill the tank = 25 minutes
A leakage can empty the tank = 5 litres/minute
Concept:
Fraction of work done = (No. of work done)/(Total no. of days required to complete the work)
Calculation:
Let, the capacity of the tank = x litres.
According to the question,
⇒ x × (20/20) + x × (20/25) – 5 × 20 = x
⇒ x + 4x/5 – 100 = x
⇒ 4x/5 = 100
⇒ x = 125
∴ Capacity of the tank = 125 litres.