document.write( "Question 1191873: A flywheel is driven by a chain that travels 4ft./second. Find the diameter (in inches) of the wheel if it makes 144 rpm. \n" ); document.write( "
Algebra.Com's Answer #823725 by Theo(13342)\"\" \"About 
You can put this solution on YOUR website!
i think it works like this.
\n" ); document.write( "the chain travels at 4 feet per second.
\n" ); document.write( "multiply that by 12 and the chain is traveling at 48 inches per second.
\n" ); document.write( "multiply that by 60 and the chain is traveling at 2880 inches per minute.
\n" ); document.write( "in that minute, the flywheel makes 144 rpm.
\n" ); document.write( "take 2880 and divide it by 144 to get a circumference of 20 for the flywheel.
\n" ); document.write( "since circumference = 2 * pi * r and since diameter = 2 * r, then the circumference can be modeled as circumference = pi * diameter.
\n" ); document.write( "since circumference = 20, then solve for diameter to get diameter = 20 / pi = 6.366197724 inches.
\n" ); document.write( "that should be your answer, if i did this correctly.\r
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\n" ); document.write( "\n" ); document.write( "you have circumference of 20.
\n" ); document.write( "in 144 revolutions of the flywheel, it has traveled 20 * 144 = 2880 inches.
\n" ); document.write( "since the chain is driving the flywheel, then the circumference of the flywheel should be traveling the same distance as the chain.
\n" ); document.write( "it appears that this solution allows that to happen.\r
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