Two neighbors, wilma and betty, each have a swimming pool. both wilma's and betty's pools hold 9900 gallons of water. if wilma's garden hose fills at a rate of 900 gallons per hour while betty's garden hose fills at a rate of 500 gallons per hour, how much longer does it take betty to fill her pool than wilma?

Question

June Reynolds

Mathematics

14 October, 05:51

Two neighbors, wilma and betty, each have a swimming pool. both wilma's and betty's pools hold 9900 gallons of water. if wilma's garden hose fills at a rate of 900 gallons per hour while betty's garden hose fills at a rate of 500 gallons per hour, how much longer does it take betty to fill her pool than wilma?

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Answers (1)

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Hailee Dickson · Answer 1

To solve this problem we will start by calculating time needed for each of them to fill the pool.

We have formula:

Volume = rate * time

Or

time = volume / rate

Wilma:

time = 9900 / 900

time = 11h

Betty:

time = 9900 / 500

time = 19.8h

Now we substract these two numbers:

time_difference = 19.8 - 11 = 8.8h

Betty needs 8.8 hours more than Wilma to fill the pool.