If Susan can paint a house in 4 hours, and Jeff can paint the same house in 6 hours, how long will it take for both of them to paint the house together?	Choose one.
A) 2.4 hr	B) 2.6 hr	C) 3.0 hr	D) 5.0 hr	E) 5.2 hr
If Susan can paint the house in 4 hours, then in 1 hour she can paint 1/4 of the house.   If Jeff can paint the house in 6 hours, then in 1 hour he can paint 1/6 of the house.   Let x = number of hours it would take them together to paint the house so,   1/4 + 1/6 = 1/x   x=12/5 or 2.4 hours   2.4 hrnswer: 2.4 hr
<result>A</result>
If Susan can paint a house in 4 hours, and Jeff can paint the same house in 6 hours, how long will it take for both of them to paint the house together?