Question

Tap A can fill 8 pails of the exact capacity in 5 minutes.

Tap B can fill 7 of the same pails in 4 minutes.
Tap A and B are turned on together to fill a total of 16 pails.
How long will it take the two taps to fill the 16 pails together? Give your answer in minutes and seconds to
the nearest second.​

Answer 1

4min 47 seconds

Explanation:

Together

8pails/5min + 7pails/4min = x

Use common denominator of 20

32/20 + 35/20 = 67pails/20min = 3.35pails/min

16/3.35 = 4.776119403 minutes

4min 60*0.776119403sec

4min 47 seconds