document.write( "Question 837804: My car tire has a diameter of 20 inches. How many times can I expect that tire to rotate if I drive 1 mile? \n" ); document.write( "

Algebra.Com's Answer #507647 by LinnW(1048) $\"\"$ $\"About$

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A tire that has diameter of 20 has circumference = $\"%28pi%2920\"$
\n" ); document.write( "So $\"%28pi%2920\"$ is the distance traveled with one tire revolution.
\n" ); document.write( "1 mile / $\"%28pi%2920\"$ will give us the number of rotations.
\n" ); document.write( "To work this we need to convert 1 mile to inches.
\n" ); document.write( "Since one mile is 5280 ft, one mile = 5280 * 12 inches
\n" ); document.write( "1 mile = 63360
\n" ); document.write( "The number of rotations = $\"63360%2F%28%28pi%2920%29\"$ = $\"3168%2F%28%28pi%29%29\"$
\n" ); document.write( "approximately 1008.4057 rotations \n" ); document.write( "

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