SOLUTION: a cooling tank can be filled by 1 pipe in 24 mins. and by the another pipe in 30 mins.how long will it takes to fill the tank if both pipes are used at the same time..??

Question 449997: a cooling tank can be filled by 1 pipe in 24 mins. and by the another pipe in 30 mins.how long will it takes to fill the tank if both pipes are used at the same time..??
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
a cooling tank can be filled by 1 pipe in 24 mins. and by the another pipe in 30 mins.how long will it takes to fill the tank if both pipes are used at the same time..??
-------------------
1st pipe rate = 1/24 job/min
2nd pipe rate = 1/30 job/min
-----
Together rate = 1/x job/min
----
Equation:
1/24 + 1/30 = 1/x
---
30x + 24x = 24*30
54x = 720
--
x = 13 1/3 minutes (time to do the job together)
=======================================================
Cheers,
Stan H.
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