Question

two pipes a and b individually can fill a tank in 10 hours and 12 hours respectively and pipe C can empty the same tank in 20 hours if three pipes are opened at a time in what time the total time be filled​

Answer 1

Answer:

1/10+1/12-1/20

6+5-3/60

8/60=15/2=7¹/²

your answer is 7¹/² hours

hope it helps you

Answer 2

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1/10+1/12-1/20

6+5-3/60

8/60=15/2=7¹/²

your answer is 7¹/² hours

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