Question

Find the area of a circle with radius, r=71.5m. Give your answer rounded to 2 DP.

Answer 1

16052.47m²

Explanation:

area of a circle=πr²

π=314

3.14×71.5×71.5=16052.465m²

=16052.47m²

Answer 2

16,060.61 m² (2 d.p.)

Explanation:

`\boxed{\begin{minipage}{4 cm}\underline{Area of a circle}\\\\$A=\pi r^2 $\\\\where:\\ \phantom{ww}$\bullet$ $r$ is the radius. \\\end{minipage}}`

Given:

• r = 71.5 m

Substitute the given radius into the area of a circle formula and solve for A:

`\implies A= \pi \cdot 71.5^2`

`\implies A= 5112.25 \pi`

`\implies A= 16060.6070...`

`\implies A= 16060.61\; \sf m^2\;(2 \; d.p.)`

Therefore, the area of the circle is 16,060.61 m² (2 d.p.).