Answer:

B.

Step-by-step explanation:

To find the radius and parameter of the circle we will follow the following steps:

As we know,

The area of the circle is πr² and the parameter is 2πr.

r is the radius of the circle.

The diameter is double of radius.

So,

Henceforth, the radius and parameter of the circle are 10 and 62.8 respectively.

D. 5m

Step-by-step explanation:

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