Question

Find the circumference of a circle whose diameter is:
a. 28cm
b. 28/2 cm

Answer 1

a) Circumference of the circle =
$2\pi \:r$
= 2 × 22/7 × 28/2 cm
= 88 cm

b) Circumference of the circle =
$2\pi \:r$
= 2 × 22/7 × 28/4 cm
= 44 cm

Answer 2

Hii frnd...

R=d/2

R=14

Circumference of a circle=2pieR

=2*22/7*14

=2*22*2

=2*44

=88

D=14cm

r=d/2 =14/2=7

C= 2 pie r

=2 × 22/7 × 7

C=44cm