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1. |
Two taps can fill a tank in 4 hours and 5 hours .If two taps are operate simultaneously, In how much timewill the tank be filled ? |
A. | 4hrs 18min |
B. | 10min 12min |
C. | 2hrs 13min |
D. | 12hrs 10min |
Answer» D. 12hrs 10min | |