Posted by **kimnlesc** on Wednesday, March 17, 2010 at 7:36pm.

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?

- algebra -
**Ms. Sue**, Wednesday, March 17, 2010 at 7:40pm
Sally can paint 3 houses in 12 hours.

John can paint 2 houses in 12 hours.

Together they can paint 5 houses in 12 hours.

12/5 = 2.4 hours per house

- algebra -
**TORI**, Wednesday, March 17, 2010 at 8:04pm
NICE !!

- algebra -
**coursonc**, Sunday, August 28, 2011 at 1:16am
Sally paints a house in four hrs or .25house per hour

John paints house in 6 hrs or one in .166hrs

If they worked together .25+.166= .416 house per hour or,

1/.416= 2.4 hrs per house

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