Question

4. Find the circumference of a circle whose diameter is 21cm.

Answer 1

Diameter of a circle = 21 CM

Circumference of a circle = ?

Solution :

Radius = Diameter/2

= 21/2 CM

= 10.5 CM

Circumference of a circle = 2πr

= 2 × 22/7 × 10.5 CM

= 66 CM

Hope it helps :)

Answer 2

$\huge\purple{♡}\pink{Answer}\purple {♡}$

Dia= 21cm

Radii= 10.5

Circumference of circle = 2πr

$= 2 \times \frac{22}{7} \times 10.5$

$= 66$