Question 86091
If Sally can paint the house in 4 hours, then she can paint 1/4 of the house in 1 hour.
If Tom can paint the house in 6 hours, then he can paint 1/6 of the house in 1 hour.
Together, they can paint (1/4 + 1/6) of the house in 1 hour.
{{{1/4 + 1/6 = 5/12)}}} 
So if together they can paint 5/12 of the house in 1 hour, then it will take them 12/5 hours to paint the entire house.
{{{12/5 = 2.4}}}hours
Together, they can paint the house in 2 hours and 24 minutes.