SOLUTION: A sludge pool is filled by two inlet pipes. One pipe can fill the pool in 15 days, and the other can fill it in 21 days. However, if no sewage is added, continuous waste removal wi

Question 863186: A sludge pool is filled by two inlet pipes. One pipe can fill the pool in 15 days, and the other can fill it in 21 days. However, if no sewage is added, continuous waste removal will empty the pool in 36 days. How long will it take the two inlet pipes to fill an empty sludge pool.
Answer by josgarithmetic(39617) (Show Source): You can put this solution on YOUR website!
The description seems ambiguous regarding the continuous waste removal, but that process is not important to the question. IF sludge is being added, continuous waste removal is unspecified, and might be assumed not happening.

Fill rate for the empty pool:

, pools per day, or days to fill the sludge pool.
RELATED QUESTIONS
Solve and verify your answer. A sludge pool is filled by two inlet pipes. One pipe can (answered by ankor@dixie-net.com)

An empty swimming pool is filled by two inlet pipes. On pipe can fill 1 & 1/10 of the... (answered by stanbon)

If two inlet pipes are both open, they can fill a pool in 3 hours and 36 minutes. One of (answered by edjones)

54. If two inlet pipes are both open, they can fill a pool in 1 hour and 12 minutes. One... (answered by stanbon)

If two inlet pipes are both open, they can fill a pool in 1 hour and 12 minutes. ONe of... (answered by ankor@dixie-net.com)

If two inlet pipes are both open, they can fill a pool in 4 hours and 48 minutes. One of... (answered by josmiceli)

If two inlet pipes are both open, they can fill a pool in 1 hour and 30 minutes. One of... (answered by josmiceli)

f two inlet pipes are both open, they can fill a pool in 3 hours and 36 minutes. One of... (answered by josgarithmetic,ikleyn)

one inlet pipe can fill a pool by itself in 3 hours. Another pipe can fill the pool in 4... (answered by richwmiller)