document.write( "Question 873541: While training for an iron man competition,tony bikes for 60 miles and runs for 15 miles. If his biking speed is 8 times his running speed and it takes 5 hours to complete the training how long did he spend on his bike \n" ); document.write( "
Algebra.Com's Answer #527057 by ankor@dixie-net.com(22740)\"\" \"About 
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While training for an iron man competition,tony bikes for 60 miles and runs for 15 miles.
\n" ); document.write( " If his biking speed is 8 times his running speed and it takes 5 hours to complete the training.
\n" ); document.write( ":
\n" ); document.write( "Let s = his running speed
\n" ); document.write( "then
\n" ); document.write( "8s = his biking speed
\n" ); document.write( ":
\n" ); document.write( "Write a time equation: time = dist/speed
\n" ); document.write( ";
\n" ); document.write( "bike time + run time = 5 hrs
\n" ); document.write( "\"60%2F%288s%29\" + \"15%2Fs\" = 5
\n" ); document.write( "Multiply thru by 8s, cancel the denominators
\n" ); document.write( "60 + 8(15) = 5(8s)
\n" ); document.write( "180 = 40s
\n" ); document.write( "s = 180/40
\n" ); document.write( "s = 4.5 mph is his running speed
\n" ); document.write( "then
\n" ); document.write( "8*4.5 = 36 mph is his biking speed
\n" ); document.write( "\"how long did he spend on his bike?\"
\n" ); document.write( "60/36 = 1\"2%2F3\" hrs on the bike
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "See if that checks out, find the total time from the bike and run times:
\n" ); document.write( "\"60%2F36\" + \"15%2F4.5\" =
\n" ); document.write( "1.67 + 3.33 = 5 hrs
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