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1. |
There is a leak at the bottom of a cistern. Due to this it takes 8 hours to fill the cistern. Had there not been a leak, it would take one hour less to fill the cistern. How much time does it take for the leak to completely empty the cistern? |
A. | 48 hours |
B. | 55(1/3) hours |
C. | 56 hours |
D. | 15 hours |
Answer» D. 15 hours | |