Question

Diameter=30km find its area of circle

Answer 1

Answer:

707.14km^2

Step-by-step explanation:

d= πr^2

=22/7×15×15

=707.14

Answer 2

Answer:

Area of circle is

$706.85 {km}^{2}$

Step-by-step explanation:

Given that

Diameter of circle is 30 km.

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

$radius = \frac{30}{2}$

hence

$radius = 15km$

hence

$area \: of \: circle = \pi \times {15}^{2}$

put

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

$area \: of \: circle = \frac{22}{7} \times 225$

hence by multiplication and division we get

$area \: of \: circle = 706.85 {km}^{2}$