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Posted by on Tuesday, March 3, 2009 at 12:22pm.

If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take for the to pain the house together?

  • math - , Tuesday, March 3, 2009 at 12:31pm

    In 24 hours, both of them can paint 6+4 houses, or 10 houses.
    So the combined rate is 10houses/24hrs, or one house per 2.4 hours.

  • math - , Tuesday, March 3, 2009 at 12:33pm

    From the information I have they are saying it should be 2 hours and 24 minutes. Can you explain?

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