document.write( "Question 358183: one painter can paint 2 rooms in 90 minutes. if there are 50 rooms how many painters are needed to paint all rooms in 7.5 hours. \n" ); document.write( "

Algebra.Com's Answer #255645 by Edwin McCravy(20056) $\"\"$ $\"About$

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one painter can paint 2 rooms in 90 minutes. if there are 50 rooms how many
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document.write( "1 painter's rate = rooms/hour\r\n" );
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document.write( "n painters' combined rate = n  rooms/hour\r\n" );
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document.write( "rooms = rate * time\r\n" );
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document.write( "   50 = n * 7.5\r\n" );
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document.write( "Multiply through by 3\r\n" );
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document.write( " 150 = 4n*7.5\r\n" );
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document.write( " 150 = 30n\r\n" );
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document.write( "   5 = n\r\n" );
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document.write( "It would take 5 painters.\r\n" );
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document.write( "Edwin

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