Question

7. Two pipes A and B can fill a cestern in 3 hours and 5 hours respectively. If both the pipes are opened together. After how many hours, the tank would be full? ​

Answer 1

Answer:

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Answer 2

Answer:

Please mark this answer as the brainliest answer

A's one hour's work = 1/3

B's one hour's work = 1/5

( A+B )'s one hour's work = 5/15 + 3/15= 8/15

( A+B )can complete the work in

$\frac{15}{8} hours$