SOLUTION: I did the work, but got the question wrong. The distance a car needs to stop is directly proportional to the square of the rate of the speed. Under certain conditions a car trav

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: I did the work, but got the question wrong. The distance a car needs to stop is directly proportional to the square of the rate of the speed. Under certain conditions a car trav      Log On


   



Question 158237: I did the work, but got the question wrong.
The distance a car needs to stop is directly proportional to the square of the rate of the speed. Under certain conditions a car traveling at 60 m.p.h. needs 300 feet to stop. With the same driving conditions, how long will it take to stop if one is traveling at 30 m.p.h.?
my work:
300/60=x/30
5/1=x/30
x=150 feet

Answer by rozy101(1) About Me  (Show Source):
You can put this solution on YOUR website!
60/2=30
300/2=150


x=150