math
posted by Becky .
I have trouble solving word problems. Can you tell me the best approach to solve this word problem?
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 both of them to paint the house together?

What is the rate of each working?
Sally=house/4hrs
John=house/6hours
combined rate= Sally rate + john rate
= house(1/4 + 1/6)=house (10/24)
housetogether=combindedrate(time
time=house/house(10/24)=24/10=2.4 hrs.