Subject: General Aptitude · Chapter: Pipes and Cisterns · Exam: 2002 · Marks: · Difficulty:
A pump can fill a tank with water in 2 hours. Because of a leak, it took $2 \frac{1}{3}$ hours to fill the tank. The leak can drain all the water of the tank in
(a)$4 \frac{1}{3}$ hours
(b)7 hours
(c)8 hours
(d)14 hours
Answer
Answer (as printed): D
Explanation
Work done by the leak in 1 hour $= \left(\frac{1}{2}-\frac{3}{7}\right) = \frac{1}{14}$. $\therefore$ Leak will empty the tank in 14 hours.
Explanation as extracted from the printed page; notation may be imperfect.