Question

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If the radius of well is 2.1 m what is the circumference?​

Answer 1

Step-by-step explanation:

Circumference = 2 pi r = 2 * 22/7 * 2.1

= 2 *22 * 0.3 =13.2

Answer 2

Step-by-step explanation:

$radius = 2.1 \\ circumference = 2\pi \: r \\ = 2 \times \frac{22}{7} \times 2.1 \\ \ = 44 \times 0.3 \\ = \ 13.2m$