SOLUTION: A pool can be filled by one pipe in 20 hours and by a second pipe 60 hours. How long will it take using both pipes to fill the pool? explain Please

Question 854115: A pool can be filled by one pipe in 20 hours and by a second pipe 60 hours. How long will it take using both pipes to fill the pool? explain Please
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
The rate of filling of the 1st pipe is:
( 1 pool filled ) / ( 20 hrs )
The rate of filling of the 2nd pipe is:
( 1 pool filled ) / ( 60 hrs )
-------------------------------
Let = the time in hours for the pipes
to fill the pool together. the rate of both filling is:
( 1 pool filled ) / ( t hrs )
----------------------
To get the rate of filling of both pipes
together, add their rates of filling:

Multiply both sides by

--------------
With both pipes filling together, the
pool is filled in 15 hrs

RELATED QUESTIONS
A pool can be filled by one pipe in 20 hours and by a second pipe in 60 hours. How long... (answered by Edwin McCravy)

A pool can be filled by one pipe in 4 hours and by a second pipe in 10 hours. How long... (answered by richwmiller)

A pool can be filled by one pipe in 12 hours and by a second pipe in 36 hours. How long... (answered by htmentor)

a pool can be filled by one pipe in 5 hours and by a second pipe in 6 hours. How long... (answered by checkley79)

A pool can be filled by one pipe in 7 hours and by a second pipe in 9 hours. How long... (answered by josgarithmetic)

A pool can be filled by one pipe in 9 hours and by a second pipe in 7 hours. How long... (answered by josgarithmetic)

A pool can be filled by one pipe in 4 hours and by a second pipe in 12 hours.how long... (answered by richwmiller)

a pool can be filled by one pipe in 20 hours and by a second pipe 60 hours. How long... (answered by richwmiller)

A pond can be filled by one pipe in 8 hours and by a second pipe in 24 hours. How long... (answered by ewatrrr)