Question

find the circumference and area of a circle radius 2.1 metre​

Answer 1

Answer:

13.19

C=2πr=2·π·2.1≈13.19469

Step-by-step explanation:

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Answer 2

Question :

Find the circumference and area of the circle of radius 2.1 m .

Answer :

$\sf\pink{Given:}$

• radius is 2.1 m.

$\sf\pink{To\:find:}$

• Circumference ?

• Area ?

Explanation :

Area of circle = πr²

$\\ \longrightarrow\sf{ \dfrac{22}{7}\times 2.1\times 2.1}$

$\\ \longrightarrow\sf{ 22\times 0.3\times 2.1}$

$\\ \longrightarrow\sf{ 6.6\times 2.1}$

$\\ \longrightarrow\sf{ 13.86}$

• Therefore the area is 13.86 m².

Circumference of circle = 2πr

$\\ \longrightarrow\sf{ 2\times \dfrac{22}{7}\times 2.1}$

$\\ \longrightarrow\sf{ 2\times 22\times 0.3}$

$\\ \longrightarrow\sf{ 44\times 0.3}$

$\\ \longrightarrow\sf{ 13.2}$

• Therefore the circumference is 13.2 m .