Question

Six pumps are required to fill a tank in one hour 20 minutes, how long will it take if only five pumps of the same type are used.

Answer 1

Answer:

8/5

Step-by-step explanation:

6 pumps fill tank in 4/3 hours

then 1 pump fill it in 8 hours

and 5 pumps will fill it in 8/5 hours or 1 hour and 36 minutes