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a. 200°

Step-by-step explanation:

A. 200

Step-by-step explanation:

Since an arc degree is the same to the corresponding angle degree, we need to find the missing angle degree:

360 - 160 = 200°

Since our angle is 200°, our arc degree is also 200°

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the answer is:

the correct option is the option b.

to calculate the surface area of the right cylinder, we need to use the following formula:

from the picture we know that:

so, substituting and calculting we have:

hence, we have that the correct option is the option b.

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