SOLUTION: One pipe can fill a tank in 20min, while another takes 30min to fill the same tank. How long would it take the two pipes together to fill that tank?
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Question 192299: One pipe can fill a tank in 20min, while another takes 30min to fill the same tank. How long would it take the two pipes together to fill that tank?
Answer by Mathtut(3670) (Show Source): You can put this solution on YOUR website!
1/20 of the pipe per min
:
1/30 of the pipe per min
:
together
:
(1/20+1/30)t=1
:
(3/60+2/60)t=1
:
(5/60)t=1
:
t=60/5=12 minutes
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