

MCQOPTIONS
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1. |
A pipe can fill a cistern in 20 minutes whereas the cistern when fill can be emptied by a leak in 28 minutes. When both pipes are opened, find when the cistern will be full? |
A. | 60 min |
B. | 80 min |
C. | 70 min |
D. | 48 min |
Answer» D. 48 min | |