A pump can fill a tank with water in 1 hours. Because of a leak, it took 1 hours to fill the tank. In how many hours can the leak alone drain all the water of the tank when it is full ?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 4.
A pump can fill a tank with water in 1 hour. Because of a leak, it took 1 hour to fill the tank
Now,
A work per minute = 1/1 = 1 unit
A and leakage work per minute = {1/(4/3)} = 3/4 units
Now,
⇒ 1 - 3/4 = (4 - 3)/4 = 1/4
Leakage per minute of work is 1/4
Thus, A full tank will be emptied by leakage in 4 hours