Question

A swimming pool that holds 1200 gallons of water can be completely drained by a two pumps. The first pump is small and can only remove 300 gallons from the pool. If the second pump is used and it removes 20 gallons every minute, how many minutes will it take to completely drain the pool?​

Answer 1

Answer: 45 minutes

Explanation:

the first pump takes care of 300 gallons so we need to worry about the remaining 900 gallons. the second pump removes 20 gallons per minute so all u have to do to find how many minutes it would take is divide 900 gallons by 20 gallons a minute which gives you 45

it will take 45 minutes to completely drain the pool