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olga2289 [7]
3 years ago
12

A windshield wiper turns through an angle of 150°. The top of the blade traces the are with a 20-inch radius. How long is the

Mathematics
1 answer:
aev [14]3 years ago
3 0

Answer:

A

Step-by-step explanation:

Arc length is given by the formula:

\displaystyle s=2\pi r\frac{\theta}{360^\circ}

Where <em>r </em>is the radius and θ is the central angle, in degrees.

The windshield wiper has a radius of 20 inches and a central angle of 150°. Hence:

\displaystyle s=2\pi (20)\left(\frac{150}{360}\right)

Use a calculator:

\displaystyle s=\frac{50}{3}\pi \approx52.36\text{ inches}

Our answer is A.

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The relevant formula that we can use in this situation is:

v = v0 + at

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<span>v = 264.82 km/hr</span>

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