document.write( "Question 770901: you and a group of friends offer to help paint a house. you need to paint 4 rooms in 8 hours. if each person can paint one room in 10 hours, how many people will it take to paint all rooms on time. \n" ); document.write( "

Algebra.Com's Answer #469861 by josgarithmetic(39618) $\"\"$ $\"About$

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The job can be identified as 1 room, and you want a rate of 4/8 room per hour. This is 1/2 room per hour rate. The rate of 1 person or 1 friend is 1/10 room per hour. \r
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\n" ); document.write( "\n" ); document.write( "The objective is find how many friends including yourself will achieve a rate of at least 1/2 room per hour. We assume the rates of all friends in the group of painters are additive.\r
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\n" ); document.write( "\n" ); document.write( " $\"highlight%28n%2A%281%2F10%29=1%2F2%29\"$
\n" ); document.write( " $\"n=10%2F2\"$
\n" ); document.write( " $\"n=5\"$
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\n" ); document.write( "The group must have 5 people to do the painting for the expected rate. \n" ); document.write( "

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