document.write( "Question 615151: If a tire rotates at 400 revolutions per minute when the car is travelling 72km/h, what is the circumference of the tire? \r
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Algebra.Com's Answer #386978 by lwsshak3(11628)\"\" \"About 
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If a tire rotates at 400 revolutions per minute when the car is travelling 72km/h, what is the circumference of the tire?
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\n" ); document.write( "Use quantitative analysis method to solve:
\n" ); document.write( "let c=circumference
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\n" ); document.write( "72km/hr*min/400 rev*hr/60min*rev/c
\n" ); document.write( "hr, min, rev, cancel out
\n" ); document.write( "=72000m/c*60*400
\n" ); document.write( "=3m/c
\n" ); document.write( "circumference=3m\r
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