Question

A circular grass lawn has an area of 314 square metres.

12.
Find the circumference of the lawn.

Answer 1

`C= 62.8m`

Explanation:

Let's round
`\pi = 3.14`. Area of a circle if
`\pi r^2`. In our case, we can easily find out the radius
`\pi r^2 = 100\pi \rightarrow r=10m^`. At this point, it's easy to find the length of the circumference by doubling it and multiplying again by
`\pi`:

`C= 2\pi r = 62.8 m`