SOLUTION: 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

Question 316175: 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?
Answer by mananth(16949) (Show Source): You can put this solution on YOUR website!
jim can do the job in 1/2 hour
so he does 2 job in 1 hour
..
sue does the same job in 3/4 hour
so she does 4/3 job in 1 hour
..
tony does the same job in 3/2 hours.
so he doe 2/3 job in 1 hour
..
together they can do 2 +4/3 + 2/3 job in 1 hour
LCM 3
6+4+2 /3
=12/3 job in 1 hour
= 4 jobs in 1 hour.
so they do 1 job in 1/4 hour
=15 minutes