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LAW ENFORCEMENT: A police accident investigator can use the formula S=25L−−−√ to estimate the speed s of a car in miles per hour based on the length l in feet of the skid marks it left. How fast was a
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LAW ENFORCEMENT: A police accident investigator can use the formula S=25L−−−√ to estimate the speed s of a car in miles per hour based on the length l in feet of the skid marks it left. How fast was a car traveling that left skid marks 129 feet long?

User Roman Samoilenko
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1 Answer

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The answer is 50.8 miles per hour.

The formula is
s=2 √(5l)
If l = 129 feet, we will implement it in the formula:

s=2 √(5l) =2 √(5*129) =2 √(645)= 2*25.4=50.8

Thus, the speed of the car that left skid marks 129 feet long was 50.8 miles per hour.
User Alan Kay
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