SOLUTION: One pipe can fill a tank in 5 hours, and another pipe can fill a tank in 7 hours. How long will it take to fill a tank if both pipes are used?
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-> SOLUTION: One pipe can fill a tank in 5 hours, and another pipe can fill a tank in 7 hours. How long will it take to fill a tank if both pipes are used?
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Question 281222: One pipe can fill a tank in 5 hours, and another pipe can fill a tank in 7 hours. How long will it take to fill a tank if both pipes are used? Answer by richwmiller(17219) (Show Source):
You can put this solution on YOUR website! x/5+x/7=1
7x+5x=35
12x=35
x=35/12
slightly less than 3 hours
2.91667 hours
35/12/5+35/12/7=1
7/12+5/12=1
pipe one does 7/12 and pipe 2 does 5/12 of the filling.
