document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=1122468>Question 1122468</A>: <I><SPAN STYLE=\"word-break: break-all;\"> A boy rides away from home in an automobile at a rate of 28 miles per hour and walks back at a rate of 4 miles an hour.  The round trip requires 2 hours. How far does he ride? </SPAN>\n" );
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document.write( "Let x be the number of hours he rides away from home at 28 mph.<br><BR>\n" );
document.write( "Then, since the speed of the automobile is 7 times his walking speed, the number of hours he spends walking is 7x.<br><BR>\n" );
document.write( "Then the total time, which is 2 hours, is equal to x plus 7x, or 8x.<br><BR>\n" );
document.write( "8x = 2  -->  x = 1/4<br><BR>\n" );
document.write( "So the amount of time he spends in the automobile is x = 1/4 hour.<br><BR>\n" );
document.write( "The distance he travels in 1/4 hour at 28 mph is 7 miles.<br><BR>\n" );
document.write( "Answer: 7 miles </SPAN>\n" );
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