SOLUTION: The formula r=2sqrt5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 70 mph?

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Question 367013: The formula r=2sqrt5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 70 mph?
Found 2 solutions by Fombitz, mananth:
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
L=r%2F%282%2Asqrt%285%29%29
L=70%2F%282%2Asqrt%285%29%29
Get out your calculator and complete the calculation for your answer.

Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
r=2sqrt5L can be used to approximate the speed r, in miles per hour, of a car that has left skid marks of length L, in feet. How far will a car skid at 70 mph?
...
70 = 2sqrt5L
/2
35=sqrt5L
square both sides
35^2= 5L
35^2/5 = L
L = 245 feet
...
m.ananth@hotmail.ca