

MCQOPTIONS
Saved Bookmarks
1. |
A cistern can be filled in 9 hours but it takes 10 hours due to a leak in its bottom. If the cistern is full, then the time that the leak will take to empty it is: |
A. | 60 hr |
B. | 50 hr |
C. | 80 hr |
D. | 90 hr |
Answer» E. | |