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Two taps P and Q can fill a tank in 12 hours and 18 hours, respectively. Both taps were opened at `7:00` am and after some time, Q was closed. It was found that the tank was full at `3:00` At what time was Q shut ?A. `10:00` amB. `12:00` noonC. `1:00`pmD. `2:00` pm |
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Answer» Correct Answer - C (i) Tank was filled in 8 hours. P was opened all the time (ii) Tap P is opened for 8 hours. Let the tap Q be opened for x housr (iii)`(8)/(12)+(x)/(18)=1` (iv) |
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