Question

What is the circumference of a circle whose area is 452.16 square meters?

Answer 1

`=75.4`metres

Explanation:

Area of the Circle `=pir^2=452.16` where `r` is the radius
So
`r^2=452.16/pi`
or
`r^2=143.92`
or
`r=12`
Circumference of the circle `=2pir`
`=2pi(12)`
`=24pi`
`=75.4`metres