MCQOPTIONS
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MCQOPTIONS
| 1. |
Two taps fill a cistem at the rate of 1 litre per minute and 2 litres per minute, respectively. A third tap empties it at rate of \(\frac{1}{2}\) litre per minute. If the capacity of the cistem is 1000 litres, then how much time will it take to fill it if all the three taps are open ? |
| A. | 7 hrs |
| B. | 6 hrs 40 min |
| C. | 6 hrs 30 min |
| D. | 6 hrs |
| Answer» C. 6 hrs 30 min | |