Question

find the area of circle whose diameter is 16 cm.​

Answer 1

Given:-

• Diameter of Circle = 16 cm.

To Find:-

• Area of Circle

Formula used:-

• Area of Circle = πr²

• Radius = $\dfrac{Diameter}{2}$

Solution:-

As we know,

Radius = $\dfrac{Diameter}{2}$

Radius = $\dfrac{16}{2}$

Radius = $8\:cm$

Now,

Area of Circle = πr²

Area of Circle = $\dfrac{22}{7}×8²$

Area of Circle = $\dfrac{1408}{7}$

Area of Circle = $201.14\:cm²$

Hence, the Area of Circle is 201.14 cm².

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More Formula for Circle:-

• Diameter = 2 × Radius

• Circumference of Circle = 2πr

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Answer 2

We know that the area of the circle is, A=$\pi r^{2}$

The diameter, d= 2r

Therefore solving for d=16 cm we get,

$A=\frac{1}{4}\pi d^{2} = \frac{1}{4}\pi 16^{2}$ ≈ 201.06193