SOLUTION: A tap X and Y can fill up an empty tank in 15 and 12 hours respectively. another tap z can empty the full tank in 8 hours. if all the tap turned together at the same time, in ho

Question 839595: A tap X and Y can fill up an empty tank in 15 and 12 hours respectively. another tap z can empty the full tank in 8 hours. if all the tap turned together at the same time, in how many hours will the tank be full?
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Find the rate of filling, as tankfulls per hour.

LCD is 2*2*2*3*5

, tanks per hour.

Uniform rate equation for filling the tank is
t = time in hours
T = how many or how much tank to fill
You are interested in filling 1 tank, so T=1.
Specific equation to solve is ; solve for t.
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