SOLUTION: A tank is drained by two pipes. One pipe can empty the tank in 45 minutes while the other can empty in an hour. If the tank is 3/4 filled and both pipes are open, at what time will

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Question 903916: A tank is drained by two pipes. One pipe can empty the tank in 45 minutes while the other can empty in an hour. If the tank is 3/4 filled and both pipes are open, at what time will the tank be emptied?
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
"How much time", not "what time."

highlight_green%28%281%2F%283%2F4%29%2B1%29%2At=3%2F4%29 according to RT=V where R is rate, T is time in hours, V is volume of 1 whole tank in counts of tanks.
Solve for t.