SOLUTION: 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 both of them to paint the house together?

Question 31054: 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 both of them to paint the house together?
Answer by longjonsilver(2297) (Show Source): You can put this solution on YOUR website!
so, Sally paints 1/4 of the house in an hour
and John paints 1/6 of the house in an hour.

Together, they paint in 1 hour.
-->
--> in 1 hour

So, 5/12 of a house in 1 hour
5 houses in 12 hours
1 house in 12/5 hours

--> together they paint it in 2.4 hours which is 2 hours and 24 minutes.

jon.

RELATED QUESTIONS
If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by CharStar)

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by Earlsdon)

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by stanbon)

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by ankor@dixie-net.com)

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by edjones)

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by checkley75)

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by nycsharkman,oscargut)

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hour, how... (answered by checkley77)