The Pool Problem Jim can fill a pool carrying buckets of water
in 30 minutes. Sue can do the same job in 45 minutes. Tony can
do the same job in 1 1/2 hours. How quickly can all three fill
the pool together? I know the answer is 15 minutes... again I
need to find a way to explain it... Originally Posted by 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 for t. If you multiply
everything by t, 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