SOLUTION: Working together, two pumps can drain a certain pool in 5 hours. If it takes the older pump 15 hours to drain the pool by itself, how long will it take the newer pump to drain the
Algebra.Com
Question 250056: Working together, two pumps can drain a certain pool in 5 hours. If it takes the older pump 15 hours to drain the pool by itself, how long will it take the newer pump to drain the pool on its own?
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Working together, two pumps can drain a certain pool in 5 hours.
If it takes the older pump 15 hours to drain the pool by itself,
how long will it take the newer pump to drain the pool on its own?
:
you can do this in your head but here is an algebra equation way
:
Let t = time required by new pump to drain the pool
:
Let the completed job (drained pool) = 1
:
+ = 1
Multiply by 15t
t(5) + 15(5) = 15
5t + 75 = 15t
75 = 15t - 5t
75 = 10t
t = 75/10
t = 7.5 hrs new pump alone
;
:
Check this
5/15 + 5/7.5 =
.33 + .67 = 1
RELATED QUESTIONS
Working together, two pumps can drain a certain pool in hours. If it takes the older... (answered by ankor@dixie-net.com)
Working together, two pumps can drain a certain pool in 6 hours. If it takes the older... (answered by ikleyn)
Working together, two pumps can drain a certain pool in
5 hours. If it takes the older (answered by josgarithmetic)
Working together, two pumps can drain a certain pool in 6 hours. If it takes the older... (answered by josmiceli,thesvw)
Working together, two pumps can drain a certain pool in 3 hours. If it takes the older... (answered by TimothyLamb)
Working together, two pumps can drain a certain pool in 4
hours. If it takes the older (answered by rothauserc)
Working together, two pumps can drain a certain pool in
3
hours. If it takes the... (answered by ikleyn,stanbon)
Problem Page
Working together, two pumps can drain a certain pool in 3 hours. If it... (answered by ikleyn)
Working together, two pumps can drain a certain pool in 3 hours. If it takes the older... (answered by Alan3354)