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Two taps P and Q can fill an empty tank in 15 hours and 30 hours respectively. Both taps were opened at 4 a.m. and after some time, tap Q was closed. It was found that the tank was full at 4 p.m. At what time was the tap Q shut ? |
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Answer» (a) Tank was filled in 12 hours. (P was open for 12 hours). (b) Tank was filled in 12 hours. P was opened for 12 hours and let Q was opened for x hours. (c ) `(12)/(15)+(x)/(30)=1`. `implies (24+x)/(30)=1` `implies x=6` hours `:.` Q was opened for 6 hours. |
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