Question

Two taps A and B together fill a swimming pool
in 15 hours. Taps A and Bare kept open for
12 hours and then tap B is closed. It takes
another 8 hours for the swimming pool to be
filled. How many hours does each tap require to
fill ​

Answer 1

A + B do work in 15 days

A + B works together for 12 days means 15–12 = 3 days or 3 unit works remaining..

which A has to done all alone…which he do in 8 days

We can easily find efficency of A = 3/8

efficiency of b = 1–3/8 = 5/8

now , A do whole work in total work/efficiency

ie 15/3/8 = 40 days

B do whole work in 15/5/8 = 24 days

Hope it helps You...

Mark me as Brainliest...