math word problem

Hannalise

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Joined
Apr 25, 2012
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Need help on math word problem PLease:)

If a crew of 4 people take 2.5 hours to clean a house, then how long should a crew of 3 take to clean the same house? assuming athat all the cleaning crew clean at the same rate.:cool:
 
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Or, from another angle, how many man(woman) hours does it take to clean the house?
Split this time between 3 people instead of 4.
 
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