SOLUTION: I have a word problem that I do not know howto set up the equation?! A hot tub can be filled by one pipe in 15 minutes and by a second pipe in 10 minutes. How long will it take

Question 466115: I have a word problem that I do not know howto set up the equation?!
A hot tub can be filled by one pipe in 15 minutes and by a second pipe in 10 minutes. How long will it take to fill the hot tub, if they are using both pipes?
Answer by sofiyac(983) (Show Source): You can put this solution on YOUR website!

cross multiply

so it would take 6 minutes
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