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OpenStudy (anonymous):
Colin and his sister Cathy are cleaning their house on Saturday morning. Their house has 9 rooms in it. They figure it takes one person about 8 minutes to clean one room. How long will it take them to clean the whole house if they work together the whole time?
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OpenStudy (anonymous):
Wouldn't it be 36 minutes?
OpenStudy (anonymous):
Yeah I think.
OpenStudy (anonymous):
I think it should be if you divide the time it takes one person by both of them, then it would be 4, and I suppose you'd just multiply that by the number of rooms.
OpenStudy (anonymous):
Oh okay then c:
OpenStudy (anonymous):
Yes.
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