Algebra problem - house painting
If Sally can paint a house in 4 hours, and John can paint the same house in hour 6 hour, how long will it take for both of them to paint the house together?
http://www.blueteach.com/rlgfr/ficheu...
If Sally can paint a house in 4 hours, and John can paint the same house in hour 6 hour, how long will it take for both of them to paint the house together?
http://www.blueteach.com/rlgfr/ficheu...