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If sally can paint a house in 4hrs, and John can paint the same house in 6hrs, How long will it take for both of them to paint the house together?
17 years ago

Answers

Reiny
Sally's rate = house/4
Johns rate = house/4

working together = house/(house/4 + house/6)
= house/(10house/24)
= house * 24 10house
= 24/10 = 2.4

it will take 2.4 hrs or 2hrs, 24 minutes
17 years ago

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