Question

What is the circumference of a cirvle those diameter is 10.5

Answer 1

Hey

Here is your answer,

Radius = diameter / 2
Radius = 10.5/2

Circumference of circle = 2πr
= 2 x 22/7 x 10.5/2
= 22 x 1.5
= 33

Hope it helps you!

Answer 2

Diameter = 10.5


Radius = d/2 = 10.5/2 = 5.25


Circumference of circle = 2πr = 2 × 22/7 × 5.25 = 33 cm.