Answer:
69.6 miles per hour
Explanation:
Length of the skid marks = 242 feet
The formula used for the velocity is

where, L is the length of skid marks in feet and the velocity obtain has the units of miles per hour.
By substituting the value

v = 69.6 miles per hour
Thus, the speed of the car at the time of accident is 69.6 miles per hour.