Two pipes can fill a cistern in 30 and 15 hours respectively. The pipes are opened simultaneously and it is found that due to leakage in the bottom, 5 hrs extra are taken for the cistern to be filled up. If the cistern is full, in what time would the leak alone empty it ?
A. 60 hrs
B. 45 hrs
C. 35 hrs
D. 30 hrs
E. None of these![]()
A. 60 hrs
B. 45 hrs
C. 35 hrs
D. 30 hrs
E. None of these