SOLUTION: 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
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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? Answer by scott8148(6628) (Show Source):
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
there are 5280 feet in a mile and 3600 seconds in an hour
so miles/hr equals feet/sec multiplied by 3600/5280
the truck is going SLOWER than Willy by (86 feet/7 sec)
