Question

What is the circumference of a circle whose radius id 3cm

Answer 1

circumstance of a circle, c=2πr

c=2×22×3/7

c=18.86cm

Answer 2

Circumference of circle=2|| r
=2 ×22/7×3
=1×11/7×3
=1×11×3/7
=33/7 cm