document.write( "Question 326056: A racetrack has two semi-circular turns, each with a radius of 1000ft, and two straightaways, each 2000 feet long. To the nearest second, how long will a car traveling 120 miles per hour take to complete one lap on the track? \n" ); document.write( "
Algebra.Com's Answer #233462 by nyc_function(2741)\"\" \"About 
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\n" ); document.write( "\n" ); document.write( "First, find the circumference of the whole circle.
\n" ); document.write( "This is given by formula C=2pi*r
\n" ); document.write( "C=2*pi*1000
\n" ); document.write( "C=2000pi\r
\n" ); document.write( "\n" ); document.write( "Since we have two semi-circular turns, that should cover both of them.
\n" ); document.write( "Now, add 2000pi to 2*2000 ft.\r
\n" ); document.write( "\n" ); document.write( "2000pi+4000=10283.1853071796ft\r
\n" ); document.write( "\n" ); document.write( "Now, since the speed is given in miles, convert the distance to miles.
\n" ); document.write( "10283.1853071796/5280= 1.9475729748446 miles.\r
\n" ); document.write( "\n" ); document.write( "Since the time is given by distance over speed, we then have:
\n" ); document.write( "1.9475729748446/120= 0.016 Seconds.
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