Question

What the area of a circle with the diameter of 10 kilometers

Answer 1

Given:

Given that the diameter of the circle is 10 kilometers.

We need to determine the area of the circle.

Radius of the circle:

The radius of the circle can be determined using the formula,

`r=(d)/(2)`

Substituting d = 10, we get;

`r=(10)/(2)`

`r=5`

Thus, the radius of the circle is 5 kilometers.

Area of the circle:

The area of the circle can be determined using the formula,

`A=\pi r^2`

Substituting r = 5, we get;

`A=(3.14)(5)^2`

`A=(3.14)(25)`

`A=78.5`

Thus, the area of the circle is 78.5 square kilometers.