Question

The area of a circle is 23.79cm2.
Find the length of the radius rounded to 2 DP.

Answer 1

2.75cm

Explanation:

Given data

Area of circle= 23.79cm^2

We know that the formula for the area of a circle is

Area= πr^2

Substitute

23.79=3.142*r^2

23.79/3.142= r^2

7.57=r^2

Square roo both sides

r= √7.57

r= 2.75 cm

Hence the radius is 2.75cm