Question

A pool is being drained at a rate of 120 gallons per minute. What is this rate in gallons per hour?

Answer 1

The easiest way to do this is by using dimensional analyis. That way we cancel out the units.

`(120gal)/(1min)* (60min)/(1hr)= 7200`

This rate is 7200 gal/hr

Answer 2

120 gallons/min * 60 minutes/hour = 120*60 gallons/hour

7200 gallons/hour