document.write( "Question 1172263: In driving to keep an appointment in another city. Harry estimated that he would arrive on time if he maintained a constant rate of 40 mph. When he was 10 mile from his destination, however, he was forced to detour over a longer route and reduce his speed to 30 mph. He arrived 15 minutes late. How long was the detour? \n" ); document.write( "

Algebra.Com's Answer #797219 by ikleyn(52803) $\"\"$ $\"About$

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\n" ); document.write( "In driving to keep an appointment in another city. Harry estimated that he would arrive on time if he maintained a constant rate
\n" ); document.write( "of 40 mph. When he was 10 mile from his destination, however, he was forced to detour over a longer route and reduce his speed
\n" ); document.write( "to 30 mph. He arrived 15 minutes late. How long was the detour?
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\n" ); document.write( "\n" ); document.write( " It can be solved mentally by reasoning, without using equations\r
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document.write( "When Harry was 10 miles from his destination, the expected time to arrive was   =   of an hour, or 15 minutes.\r\n" );
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document.write( "But moving detour, Harry spent 15 minutes + 15 minutes = 30 minutes = 0.5 of an hour.\r\n" );
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document.write( "Hence, the deture was  40 mph x 0.5 of an hour = 20 miles long.    ANSWER\r\n" );
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\n" ); document.write( "\n" ); document.write( "Solved.\r
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