Question

If the radius of the circle is 4 cm, find its circumference. [Use 3.14 for π.]

A) 12.56 cm
B) 25.12 cm
C) 37.68 cm
D) 50.24 cm

Answer 1

B.25.12

Explanation:

Solution

C=2πr=2·π·4≈25.13274cm

Hope this helps!

Answer 2

C =25.12 cm

Explanation:

Circumference of a circle is given by

C = pi d

We know that d = 2r (twice the radius)

C = pi *2r

Substituting in

C = pi*2*4

C = pi*8

Using 3.14 for pi

C = (3.14)*8

C =25.12 cm