Question 650084
sam is filling his swimming pool. the fill pipe for a swimming pool can fill the pool in 2 hours, and the drain pipe can drain it in 3 hours. Sam accidentally leaves both pipes open. How long will it take to fill the swimming pool
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Let x = time (hours) to fill pool
then
x(1/2 - 1/3) = 1
multiplying both sides by 6:
x(3 - 2) = 6
x(1) = 6
x = 6 hours