Question

Romita cuts a circle
of 30cm diameter. She wants to put a thin ribbon around it.
What will be the required length of the ribbon? (11= 3.14)
​

Answer 1

Circumference of circle.

2pi r

2 x pi x radius

pi = 3.14

radius = diameter divided by 2

radius = 30 by 2 = 15

2 x pi x 15

15 x 2

30

30 x 3.14

=94.2