SOLUTION: A pond can be filled with runoff water in 6 hours. It can be filled with well water in 9 hours. How long will it take to fill the pond using both runoff and well water. Thanks :)

Question 337084: A pond can be filled with runoff water in 6 hours. It can be filled with well water in 9 hours. How long will it take to fill the pond using both runoff and well water. Thanks :)
Answer by nerdybill(7384) (Show Source): You can put this solution on YOUR website!
A pond can be filled with runoff water in 6 hours. It can be filled with well water in 9 hours. How long will it take to fill the pond using both runoff and well water.
.
Let x = time it takes for both to fill pond
then
x(1/6 + 1/9) = 1
multiplying both sides by 54:
x(9 + 6) = 54
15x = 54
x = 54/15
x = 3.6 hours
or
x = 3 hours and 36 minutes
RELATED QUESTIONS
23. A pool can be filled with water by a large pipe within 6 hours. A smaller pipe will... (answered by ewatrrr)

A pool can be filled with water by a large pipe within 6 hours. A smaller pipe will take... (answered by TimothyLamb)

Using pipe A, a pool can be filled with water in 4 hours. Pipe B can drain the pool in 8... (answered by mananth)

using pipe A, a pool can be filled with water in 4 hours. Pipe B can drain the pool in 8... (answered by mananth)

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

A water tank can be filled in 9 hours and then drained in 12 hours. How long would it... (answered by ikleyn,greenestamps)

a pool can be filled water using pipe a in 4hrs drained using pipe b in 10 hours. if... (answered by mananth)

I don't know how to set it up. *the city swimming pool can be filled from two sources, (answered by ptaylor)

I need help with this homework problem: A swimming pool can be filled in 17 hours if... (answered by jorel1380)