SOLUTION: a filler pipe can fill a tank in 10 hours, while an outlet pipe can empty the tank in 15 hours. how long will it take to fill the empty tank with both pipes operating

Question 310430: a filler pipe can fill a tank in 10 hours, while an outlet pipe can empty the tank in 15 hours. how long will it take to fill the empty tank with both pipes operating
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
a filler pipe can fill a tank in 10 hours, while an outlet pipe can empty the
tank in 15 hours. how long will it take to fill the empty tank with both pipes operating
:
Let t = time required when both pipes are on
:
Let the completed job = 1 (a full tank)
:
Fill is +, drain is -
:
- = 1
Multiply eq by 30,
30* - 30* = 30(1)
results
3t - 2t = 30
t = 30 hrs to fill with both pipes on
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