Please help, I get 12/13 of an hour, but have no way of checking my answer:
Here is the question:
I have three hoses and I wish to paint my bathroom. If I use my blue paint hose, I could paint it in 2 hours. If I use my green hose, I could do it in 3 hours. If I use my red hose, I could paint it in 4 hours. If I don't mind very much about what it looks like and use all three hoses at the same time, how long would it take to paint the room?