A pool can be filled by one pipe in 4 ours and by a second pipe en 12 hours. How long will it take using both pipes to fill the pool?
______ hours

Question

A pool can be filled by one pipe in 4 ours and by a second pipe en 12 hours. How long will it take using both pipes to fill the pool?
______ hours

anonymous · Answer

Please help me with this problem

tkhunny · Answer

How much of the pool can be filled by each pipe in one (1) hour?

anonymous · Answer

I don't know, is that all the information that I have :(

tkhunny · Answer

Not a good answer.  Please do not just throw your hands in the air.  It requires thought and careful attention.  An immediate lack of direction is not important.  Take a deep breath and think about it.

"A pool can be filled by one pipe in 4 hours"

1/4 of the pool can be filled by this pipe in one (1) hour.

Do you see that this is so?