"A pipe can fill a cistern in 6 hours. Due to a   leak in the bottom it is filled in 7 hours. When
Channel: Doubtnut
Date: 2020-07-12

"A pipe can fill a cistern in 6 hours. Due to a
 
  leak in the bottom it is filled in 7 hours. When the cistern is full, in how
 
  much time will it be emptied by the leak?"