document.write( "Question 70253This question is from textbook
\n" ); document.write( ": Bobby and Ricky are in a 10 lap race on a 1-mile oval track. Bobby averaging 90mph, has completed 2 laps just as Ricky gets his car on the track. What speed does rick have to average to be even with Bobby at the end of the 10th lap. \n" ); document.write( "
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Bobby and Ricky are in a 10 lap race on a 1-mile oval track. Bobby averaging 90mph, has completed 2 laps just as Ricky gets his car on the track. What speed does rick have to average to be even with Bobby at the end of the 10th lap.
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\n" ); document.write( "We can simplify this by saying what speed will Ricky have to go to cover 10 mi
\n" ); document.write( "while Bobby covers 8 miles?
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\n" ); document.write( "Let s = Ricky's speed
\n" ); document.write( "T = dist/speed
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\n" ); document.write( "8/90 = 10/s
\n" ); document.write( "Cross multiply
\n" ); document.write( "8s = 900
\n" ); document.write( "s = 900/8
\n" ); document.write( "s = 112.5 mph to overtake Bobby on completion of the 10th lap \n" ); document.write( "
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