SOLUTION: It takes pipe 1 ten hours to fill a pool. Pipe 2 can do it in 12 hours. If the pool is full, the drain pipe can empty it in 15 hours. If the pool were empty and all pipes were open

Question 440462: It takes pipe 1 ten hours to fill a pool. Pipe 2 can do it in 12 hours. If the pool is full, the drain pipe can empty it in 15 hours. If the pool were empty and all pipes were open, how long would it take to fill it?
I need to describe the variable, variable phrases, write the equation, and solve it. Thank you soo much!
Answer by jorel1380(3719) (Show Source): You can put this solution on YOUR website!
t/10+t/12-t/15=1
12t+10t-8t=120
14t=120
t=120/14=60/7 hours to fill the pool..
RELATED QUESTIONS
A hose can fill a pool in 12 hours. A drainage pipe can empty the pool in 18 hours. If... (answered by ptaylor)

an inlet pipe on a swimming pool can be used to fill the pool in 10 hours. The drain pipe (answered by mananth)

An inlet pipe on a swimming pool can be used to fill the pool in 21 hours. The drain pipe (answered by Alan3354)

An inlet pipe on a swimming pool can be used to fill the pool in 34 hours. The drain... (answered by Boreal)

An inlet pipe on a swimming pool can be used to fill the pool in 6 hours. The drain pipe... (answered by Boreal)

An inlet pipe on a swimming pool can be used to fill the pool in 6 hours. The drain pipe... (answered by ikleyn)

Pipe A can fill a pool in 5 hours. Pipe B can fill it in 2 hours less than it takes Pipe (answered by josmiceli)

One inlet pipe can fill an empty pool in 4 hours, and a drain can empty the pool in 8... (answered by josmiceli)

one inlet pipe can fill an empty pool in 4 hours, and a drain can empty the pool in 8... (answered by Alan3354)