Answered: Police use the formula: v=√20L to…

Elementary Geometry For College Students, 7e

7th Edition

ISBN:9781337614085

Author:Alexander, Daniel C.; Koeberlein, Geralyn M.

Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.

Chapter5: Similar Triangles

Section5.1: Ratios, Rates And Proportions

Problem 15E: Sarah ran the 300-m hurdles in 47.7 sec. In meters per second, find the rate at which Sarah ran....

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Question

Police use the formula:

v=√20L

to estimate the speed of a car, v, in miles per hour, based on the length, L, in feet, of its skid marks when suddenly braking on a dry, asphalt road.

A policeman measures a car's skid marks to be 211 feet long. Approximately how fast was the car traveling? Round your answer to the nearest tenth (one decimal place) of a unit.

........... miles per hour.

Expert Solution

Step 1

QUESTION-

Police use the formula:

v=√20L

to estimate the speed of a car, v, in miles per hour, based on the length, L, in feet, of its skid marks when suddenly braking on a dry, asphalt road.