document.write( "Question 110877: The radius of the earth at the equator is approximately 4000 miles. Suppose a jet flies once around the earth at a speed of 500 miles an hour relative to earth. If the flight path is a negligible height above the equator, give the number of hours of flight. \n" ); document.write( "

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The radius of the earth at the equator is approximately 4000 miles. Suppose a jet flies once around the earth at a speed of 500 miles an hour relative to earth. If the flight path is a negligible height above the equator, give the number of hours of flight.
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\n" ); document.write( "Find the circumference of the earth:
\n" ); document.write( "C = 2*pi*4000
\n" ); document.write( "C = 25132.74 mi
\n" ); document.write( ":
\n" ); document.write( "Time = Dist/speed
\n" ); document.write( "T = 25132.74/500
\n" ); document.write( "T= 50.2655 hrs \n" ); document.write( "

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