Question

Solve the following in your book.
1) The radius of a bicycle wheel is 21 cm. find its circumference.​

Answer 1

Answer:

132 cm

Step-by-step explanation:

It is given that,

Radius of a circle = 21 cm.

We know that π =22/7,

So the circumference of a circle = 2πr

Substituting the values,

=2×22/7×21

So we get,

=2×22×3

=132 cm