SOLUTION: a tank can be filled in 18 hours by pipe A or in 24 hours by pipe B. How long would it take both pipes to fill the tank?

Question 458152: a tank can be filled in 18 hours by pipe A or in 24 hours by pipe B. How long would it take both pipes to fill the tank?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add the rates of flow of both pipes

This is read as:
(1 tankful)/(A's time to fill it) + ( 1 tankful)/(B's time to fill it) = (1 tankful)/(A and B's time to fill it)
Multiply both sides by

It takes both pipes 10 hrs 17 min 9 sec
check:

close enough
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