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It takes 20 minutes to fill a wading pool. The pool has developed a leak through which it will empty in 30 minutes. If the hole is not fixed, how long will it take to fill the wading pool?
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It takes 20 minutes to fill a wading pool. The pool has developed a leak through which it will empty in 30 minutes.

If the hole is not fixed, how long will it take to fill the wading pool?

User Akaliza
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1 Answer

3 votes
In t minutes, t/20 of the pool is filled and t/30 of it is emptied.

t/20 - t/30 = 1
multiply both sides by LCM 60.

3t - 2t = 60
t = 60

The pool is filled in 60 minutes.
User Rescobar
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