A Police Department Has Set Up a Speed Enforcement Zone

question 199

Multiple Choice

A police department has set up a speed enforcement zone on a straight length of highway.A patrol car is parked parallel to the zone, a = 210 feet from one end and b = 130 feet from the other end (see figure) . ​ ​
Find the length l of the zone.Round your answer to two decimal places.
​

• A)286.98 ft
• B)276.98 ft
• C)266.98 ft
• D)246.98 ft
• E)256.98 ft

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Definitions:

Synchronous Motor

An AC motor that operates at a constant speed, set by the power supply frequency, and whose rotor is synchronized with the magnetic field of the stator.

Amortisseur Winding

A squirrel-cage winding on the rotor of a synchronous motor used for starting purposes only.

Phase Rotation Meter

A meter used to determine the rotation of a motor.

Machinery

Mechanical devices or assemblies, which perform specific functions in industrial, agricultural, or domestic settings.