Question

Diameter of a circle is 3.5cm. Find its area.

Answer 1

Answer:

Radius of the circle = $\frac{35}{10} \times \frac{1}{2}$

$= \frac{7}{4}$

Area of the circle =$\pi {r}^{2}$

$= \frac{22}{7} \times { \frac{7}{4} }^{2}$

$= \frac{77}{8}$

= 9.62500

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Answer 2

Answer:

Area of circle is

$9.62 {cm}^{2}$

Step-by-step explanation:

Given that

Diameter of circle is 3.5cm.

To calculate

Area of circle

Solution

As we know that

$area \: of \: circle = \pi \times {radius}^{2}$

As here diameter is given and we know that radius is always half of its diameter hence

$radius = \frac{3.5}{2}$

hence

$radius = 1.75cm$

hence

$area \: of \: circle = \pi \times {1.75}^{2}$

put

$\pi = \frac{22}{7}$

$area \: of \: circle = \frac{22}{7} \times 1.75*1.75$

hence by multiplication and division we get

$area \: of \: circle = 9.62 {cm}^{2}$