Question

A belt is drawn tightly around three circles of radius $10$ cm each, as shown. the length of the belt, in cm, can be written in the form $a + b\pi$. what is the value of $a + b$?

Answer 1

A belt is drawn tightly around three circles of radius 10 cm. Then, the perimeter of the 3 circles would be:
3 * circle perimeter
3 * 2 *pi * r
6* pi * 10= 60 * pi

Since the symbole messed up, I will give 2 possible answer
If the equation expressed as (a+b)/pi, then the value of a+b would be:
(a+b)/pi= 60* pi
a+b= 60*pi * pi
a+b= 60*pi^2 
If the equation expressed as (a+b)*pi, then the value of a+b would be:
(a+b)*pi= 60* pi
a+b= 60