If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how long will it take for?
I assume it would be more like 2hours and a half, but I don't know how to solve it. Would you please help me out?
- hayharbrLv 71 decade agoFavorite Answer
Sally does 1/4 of the job in one hour and John does 1/6, so together they do (1/4 + 1/6)
= 3/12 + 2/12
= 5/12 of the job in one hour
So it would take 12/5 hours to finish. That's 2 2/5 hours or 2 hours and 24 minutes.