SOLUTION: Together, two pipes can fill a tank in 3 hours. If the smaller pipe takes 7 hours to fill the tank, how long does it take the larger pipe to fill the tank?
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Question 820898: Together, two pipes can fill a tank in 3 hours. If the smaller pipe takes 7 hours to fill the tank, how long does it take the larger pipe to fill the tank?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Together, the rate of fil;ling is:
( 1 tank filled ) / ( 3 hrs )
The rate of filling of the smaller pipe is:
( 1 tank filled ) / ( 7 hrs )
-----------------------
Let = the time in hrs for the larger pipe
to fill the tank
Add the rates of filling of the 2 pipes:
Multiply both sides by
hrs
min
It will take the larger pipe 5 hrs and 15 min
to fill the tank
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