Question

circulate perimeter of circular ring .if length of radius is 3.5 cm.​

Answer 1

Answer:

Given radius of circle is r=3.5 cm

as we know that

Perimeter of circle with radius r is 2πr and area of circle is πr2

So perimeter of circle is 2π(3.5)=722×7=22 cm

Area of circle  is π(3.5)2=7×422×7×7=38.5 cm2

Answer 2

Answer:

21.98

Step-by-step explanation:

The perimeter of circular ring = 2*$\pi$*R

R = 3.5 cm

$\pi$ = 3.14

2*3.14*3.5 = 21.98 cm