What is the circumference of a circle with a diameter of 30 centimeters?

Question

a) 188.4cm
b) 47.1cm
c) 94.2cm
d) 9.55cm

Answer 1

Diameter(d ) = 2r = 30 c.m

r = d /2

= 30/2

= 15 c.m.

Circumference of a circle is 2πr

Substitute π = 3.14 and r = 15.

= 2(3.14)(15)

= 94.2 c.m

Circumference of a circle is 94.2 c.m .

Comments

Units indication is wrong.

Centimeters should be cm