SOLUTION: The stopping distance, d, of a particular car after the brakes are applied varies directly as the square of the rate,r. If the car is traveling 40 mph, it can stop in 60 ft. How ma

Question 1045976: The stopping distance, d, of a particular car after the brakes are applied varies directly as the square of the rate,r. If the car is traveling 40 mph, it can stop in 60 ft. How many ft will it take the same car to stop when it is traveling 80 mph?
Answer by ikleyn(52788) (Show Source): You can put this solution on YOUR website!
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The stopping distance, d, of a particular car after the brakes are applied varies directly as the square of the rate,r.
If the car is traveling 40 mph, it can stop in 60 ft. How many ft will it take the same car to stop when it is traveling 80 mph?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

 = ,  or

 = ,


x =  = 60*4 = 240 feet.

Answer.  240 feet.

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