document.write( "Question 1156891: For a car moving at a constant speed the distance traveled varies directly with the time spent driving. If such a car travels 400 miles in 10 hours, how long does it take to travel 280 miles? How many hours? \n" ); document.write( "

Algebra.Com's Answer #779682 by ikleyn(52803) $\"\"$ $\"About$

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document.write( "400 miles in 10 hours is the rate of  = 40 miles per hour.\r\n" );
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document.write( "At this rate, the car will cover 280 miles in   = 7 hours.    ANSWER\r\n" );
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document.write( "Alternatively, you can write a proportion\r\n" );
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document.write( "     = \r\n" );
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document.write( "and find the unknown time  \" t \" from this proportion\r\n" );
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document.write( "    t =  = 7  hours.\r\n" );
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document.write( "Surely, you get the same answer.\r\n" );
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