document.write( "Question 359868: Chris's average speed for a 6 hour trip was 70mi/h. for the first 4 hours, Chris drove at 62 mi/hr. What was his average speed for his last 2 hours of his trip? \n" ); document.write( "
Algebra.Com's Answer #256808 by ankor@dixie-net.com(22740)\"\" \"About 
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Chris's average speed for a 6 hour trip was 70mi/h. for the first 4 hours,
\n" ); document.write( " Chris drove at 62 mi/hr.
\n" ); document.write( " What was his average speed for his last 2 hours of his trip?
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\n" ); document.write( "Let s = av speed for the last two hrs
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\n" ); document.write( "Write a distance equation, dist = speed * time
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\n" ); document.write( "62(4) + 2s = 6(70)
\n" ); document.write( "248 + 2s = 420
\n" ); document.write( "2s = 420 - 248
\n" ); document.write( "2s = 172
\n" ); document.write( "s = 86 mph for the last two hrs to average 70 mph for the trip \n" ); document.write( "
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