A bathtub is being filled at a rate of 2.5 gallons per minute. The bathtub will hold 20 gallons of water. How long will it take the bathtub to fill?

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chubbyfingers1 chubbyfingers1

18-05-2017
Mathematics

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A bathtub is being filled at a rate of 2.5 gallons per minute. The bathtub will hold 20 gallons of water. How long will it take the bathtub to fill?

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BetterThanAkin BetterThanAkin · Answer 1 · 2017-05-18T02:39:19+02:00

We know that the tub needs 20 gallons to fill, so our equation will be

something something = 20

Now, we know that it fills at 2.5 gallons PER MINUTE. That per minute is very important because it tells us how many gallons are filled after a certain amount of time.

So, we write the equation as 2.5x = 20. This is because our x (the unknown) is time, and it is filling up 2.5 gallons per time. So, divide 2.5 on each side, and we get 8 minutes as our answer.