SOLUTION: 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? I'm not sure if this i

Question 126952: 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? I'm not sure if this is the section for this problem but if tutor can help i would greatly be appretiated,thanks
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Add their rates of working to get the final rate
In words:
(1 house) / (Sally's time) + (1 house) / (John's time)
= (1 house)/(unknown time)

multiply both sides by 12

multiply both sides by

Together they can paint the house in 2.4 hours
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