SOLUTION: One pipe alone can fill a tub in 12 minutes. Another pipe can fill it in only 8 minutes, how long will it take for both pipes to fill the tub if they work together?

Question 770103: One pipe alone can fill a tub in 12 minutes. Another pipe can fill it in only 8 minutes, how long will it take for both pipes to fill the tub if they work together?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of filling
1st pipe's rate:
( 1 tub ) / ( 12 min )
2nd pipe's rate:
( 1 tub ) / ( 8 min )
----------------
Let = time in minutes for
both pipes to fill tub

Multiply both sides by

It will take them 4.8 min

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