document.write( "Question 755550: If it takes 8 students 20 minutes to wash 3 cars, how many cars can 16 students wash in 30 minutes \n" ); document.write( "

Algebra.Com's Answer #459706 by josgarithmetic(39628) $\"\"$ $\"About$

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More than half the solution process is here:\r
\n" ); document.write( "\n" ); document.write( " 8 students 20 minutes to wash 3 cars\r
\n" ); document.write( "\n" ); document.write( "By intuition for the ratio, 8 students need 20/3 minutes to wash 1 car.
\n" ); document.write( "The job seems to be, \"wash one car\", and we want the rate for 1 student.
\n" ); document.write( "One student will need 8 times longer to wash 1 car, so:
\n" ); document.write( "1 student needs $\"8%2A20%2F3\"$ minutes to do the job of washing 1 car. \r
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\n" ); document.write( "\n" ); document.write( "This one-student job rate is then $\"1%2F%28%288%2A20%29%2F3%29=highlight%283%2F%28240%29%29\"$ jobs per minute. \r
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\n" ); document.write( "\n" ); document.write( "Can you do the rest of the solution? {when the student work at the same time, their rates, each the same, are additive.} \n" ); document.write( "

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