Two pipes A and B can fill a cistern in `12 1/2` hours and 25 hours, respectively. The pipes are opened simultaneously and it is found that due to a leakage it the bottom, It took 1 hour and 40 minutes more to fill the cistern. When the cistern is full, in how much time will the leak empty the cistern?

Options

A. 48 hours
B. 42 hours
C. 45 hours
D. 40 hours

Answer

D