document.write( "Question 319990: A person running an 800-meter race averages 130 meters per minute for the first 3/4 of the race. The average speed for the remainder of the race is 145 meters per minute. What is the person's average speed for the entire 800 meters rounded to the nearest whole number? \n" ); document.write( "

Algebra.Com's Answer #229162 by mananth(16946) $\"\"$ $\"About$

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A person running an 800-meter race averages 130 meters per minute for the first 3/4 of the race. The average speed for the remainder of the race is 145 meters per minute. What is the person's average speed for the entire 800 meters rounded to the nearest whole number?
\n" ); document.write( "..
\n" ); document.write( "3/4 *800= 600 meters
\n" ); document.write( "Avg speed = 130 mtr/minute
\n" ); document.write( "time taken = 600 /130 minutes
\n" ); document.write( "..
\n" ); document.write( "next 200 meters
\n" ); document.write( "speed = 145m/minute
\n" ); document.write( "time = 200/145 minutes
\n" ); document.write( "..
\n" ); document.write( "Total time taken = 600/130 + 200/145
\n" ); document.write( "5.994 minures = 6 minutes
\n" ); document.write( "..
\n" ); document.write( "total distance = 800 meters
\n" ); document.write( "total time = 6 minutes
\n" ); document.write( "average speed = 800/6 = 133.33 meters/minute \n" ); document.write( "

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