Question

The circumference of a circle is 15.2mm.

Find the length of the radius.
Give your answer rounded to 1 DP. HELP PLS

Answer 1

2.4mm -> pi*diameter=circumference so divide by pi to get the diameter, then the radius is half of this

Answer 2

r = 2.4

Explanation:

Given, circumference = 15.2 mm

We know that, circumference = 2πr

So, 2πr = 15.2 mm

=> 2(3.14)r = 15.2

=> 3.14r = 15.2/2

=> 3.14r = 7.6

=> r = 7.6/3.14

=> r = 2.42...

=> r = 2.4 [rounded to one decimal place]