Q17. Two taps can separately fill a cistern in 6 and 7 minutes respectively. If the taps are opened turn by turn each for one minute, find the time taken by them to fill the cistern? [quovantis18]
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Tap A can fill a cistern in 6 minutes
Tap B can fill same cistern in 7 min
therefore work done by both tap in 1 min
=1/6+1/7=7+6/42=13/42work
since time taken to fill cistern = 42/13=3whole3/13minutes
=Your answer it might help you plz mark as brainlist
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