Hi Caity,

Ah...the good old work problem.

Jim can fill the pool in 30 minutes. So, he fills 1/30 of the pool in 1 minute.

Sue can fill the pool in 45 minutes. So, she fills 1/45 of the pool in 1 minute.

Tony can fill the pool in 90 minutes. So, he fills 1/90 of the pool in 1 minute.

Now, solve fort.

If you multiply everything byt, the equation will look this way:

You can find similar "work" problems and a pretty good explanation here: "Work" Word Problems

Also, here is a related thread in this forum: http://www.mathhelpforum.com/math-he...ng-172924.html