Question 143224
If Sally can paint 1 house in 4 hours, she can paint {{{1/4}}} of a house in 1 hour.  Likewise, Jim can paint {{{1/6}}} of a house in 1 hour.


Together they can paint {{{1/4+1/6}}} house in 1 hour.


Complete the sum above and then take the reciprocal (invert the fraction) to get the time for both to complete the house together.  Note -- your answer MUST be smaller than 4 hours.  That's because Sally can do the job in 4 hours but now that Jim is helping, the job must go faster than that.


By the way, how can I get in touch with this Sally person?  If she can really paint a house in 4 hours, I want to hire her.