document.write( "Question 814786: In 2 minutes a conveyor belt moves 800 pounds of aluminum from the delivery truck to a storage area. A smaller belt moves the same quality of cans in 4 minutes. If both belts are used find out how long it takes to move the cans to the storage area? \n" ); document.write( "
Algebra.Com's Answer #490498 by TimothyLamb(4379)\"\" \"About 
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r = w / t
\n" ); document.write( "t = w / r
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\n" ); document.write( "a = 800 / 2 = 400 lb/min
\n" ); document.write( "b = 800 / 4 = 200 lb/min
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\n" ); document.write( "a + b = 600 lb/min
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\n" ); document.write( "t = 800 / (a + b)
\n" ); document.write( "t = 800 lb / 600 lb/min = 1.33333 min = 1 min and 20 seconds
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