document.write( "Question 348670: Willy is driving south at a constant speed of 65 mph. If his car is 16 feet long and it takes him 7 seconds to pass a 70 foot tractor-trailer truck, how fast is the truck traveling? \n" ); document.write( "
Algebra.Com's Answer #249342 by scott8148(6628)![]() ![]() You can put this solution on YOUR website! Willy travels (relative to the truck) the length of the truck plus the length of his car in 7 seconds\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "there are 5280 feet in a mile and 3600 seconds in an hour\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "so miles/hr equals feet/sec multiplied by 3600/5280\r \n" ); document.write( " \n" ); document.write( "\n" ); document.write( "the truck is going SLOWER than Willy by (86 feet/7 sec) \n" ); document.write( " |