SOLUTION: one pipe can empty the tank in 4 hours. a second pipe takes 2 hours to do the same job. how long will it take to empty the tank if both pipes are open?
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-> SOLUTION: one pipe can empty the tank in 4 hours. a second pipe takes 2 hours to do the same job. how long will it take to empty the tank if both pipes are open?
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Question 631672: one pipe can empty the tank in 4 hours. a second pipe takes 2 hours to do the same job. how long will it take to empty the tank if both pipes are open?
You can put this solution on YOUR website! one pipe can empty the tank in 4 hours. a second pipe takes 2 hours to do the same job. how long will it take to empty the tank if both pipes are open?
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Let x = time (hours) it takes for both
then
x(1/4 + 1/2) = 1
x(1/4 + 2/4) = 1
x(3/4) = 1
x(3) = 4
x = 4/3 hours
or
x = 1 and 1/3 hours
or
x = 1 hour and 20 minutes
