A leak at the bottom of the tank can empty the tank in 5 hours, while an inlet pipe can fill the same tank at the rate of 6 litres per minute. When the tank is full, the inlet is opened and the tank gets empty in 8 hours due to the leakage. Find the capacity of the tank.  Pick one.
A) 1800 litres	B) 3600 litres	C) 4800 litres	D) 5760 litres	E) None of these
Explanation:   The capacity of the tank is given by 4800 litres = (p*q*r)/(r – p) litres   Where, p = time in which the leakage can empty the tank in hours = 5 hours   q = rate at which the inlet fills the tank in lph = 6*60= 
<gadget id="calculator">6*60</gadget>
<output>360</output>
360 lph   r= time in which the tank gets emptied in hours = 8 hours   Hence, 4800 litres = (5*360*8)/(8 – 5)   4800 litres = 4800 litres   ANSWER 4800 litres
<result>C</result>
A leak at the bottom of the tank can empty the tank in 5 hours, while an inlet pipe can fill the same tank at the rate of 6 litres per minute. When the tank is full, the inlet is opened and the tank gets empty in 8 hours due to the leakage. Find the capacity of the tank.