Question

If 28 pumps can empty a reservoir in 18 hours, how long will 42 pumps take to do the same work?

Answer 1

Answer:

Do this.

Step-by-step explanation:

28 pumps are taking 18 hours.

42 pumps will take how much?

28 - 18

42 -?

18 × 42/28 =

18 × 1.5 = 27

So it will take 27 hours to pump.