Question

Hey help me. ................

Answer 1

Here is your answer,

8 pumps can empty a tank in 42 hours.

Now, for 56 pumps it would take 56/8= 7

Now, time required would be 42/7=6

Therefore it would take 6 hours!

Answer 2

Hi here is the answer,

8 pump do work in=42hr
Therefore, 56 pumps take time to do same work=42×8/56
=6 hr

Therefore, 56 pumps take time to do same work is 6 hr