A pipe can fill the tank in 5 hours. Due to leakage at the bottom it is filled in 6 hours. When the tank is full, in how much time will it be empties by the leak? Choose the correct choice from the following choices:
A) 30 hours	B) 28 hours	C) 27 hours	D) 25 hours	E) 24 hours
When there is no leakage, the pipe can fill the cistern in 5 hours.   Therefore, The pipe fills 1/5 th part of the tank in one hour.   When there is a leakage, the pipe can fill the cistern in 6 hours.   In case of leakage, the pipe fills 1/6 th part of the tank in one hour.   So, in 1 hour due to leakage (1/5 – 1/6) th   = (6 – 5)/30 th   = 1/30 th   The part of the tank is emptied.   So, the tank will be emptied by leakage in 30 hours.   answer :30 hours
<result>A</result>
A pipe can fill the tank in 5 hours. Due to leakage at the bottom it is filled in 6 hours. When the tank is full, in how much time will it be empties by the leak?