Question

A pump can fill a tank with water in 1 hour. Because of a leak, it took $1\frac{1}{3}$ hours to fill the tank. In how many hours can the leak alone drain all the water of the tank when it is full?

• A. 2
• B. 5
• C. 4
• D. 1

Answer 1

Answer:

C. 4

Solution: Given: A takes 1 hour to fill tank. A with leakage takes 4/3 hours Concept used: we will use fraction method to find per minute work A work per minute is 1/1 A and leakage work per minute is {1/(4/3)} = 3/4 Calculation: we subtract A and leakage form A ⇒ 1 - 3/4 =(4 -3)/4 =1/4 leakage per minute work is 1/4 ∴ A full tank will be emptied by leakage in 4 hours.