SOLUTION: If sally can paint a house in 4 hours and john can paint the same house in 6 hours how long it take for both of them to paint a house togethe

Algebra ->  Decimal-numbers -> SOLUTION: If sally can paint a house in 4 hours and john can paint the same house in 6 hours how long it take for both of them to paint a house togethe      Log On


   

Question 1120658: If sally can paint a house in 4 hours and john can paint the same house in 6 hours how long it take for both of them to paint a house togethe
Answer by josgarithmetic(39618) About Me  (Show Source):
You can put this solution on YOUR website!
1%2F4%2B1%2F6, their combined rate when painting the house together

%281%2F4%29%283%2F3%29%2B%281%2F6%29%282%2F2%29

3%2F12%2B2%2F12

5%2F12-----------now you want the reciprocal, for how much TIME in hours for painting the 1 house.