Subject: General Aptitude · Chapter: Pipes and Cisterns · Exam: 2002 · Marks: · Difficulty:
A tank with capacity T litres is empty. If water flows into the tank from pipe X at the rate of $x$ litres per minute and water is pumped out by Y at the rate of $y$ litres per minute and $x>y$, then in how many minutes will the tank be filled?
(a)$(x-y) 60$ T
(b)$(\mathrm{T}-x) y$
(c)$\frac{T}{(x-y)}$
(d)$\frac{T}{(y-x)}$
Answer
Answer (as printed): C
Explanation
Net volume filled in 1 minute $= (x-y)$ litres. $\therefore$ Time taken to fill the tank $= \frac{T}{(x-y)}$ minutes.
Explanation as extracted from the printed page; notation may be imperfect.