Question

what is the circumference of a circle with a diameter of 150 mm

Answer 1

circumference of a circle = 471 mm

Explanation:

circumference of a circle = 2πr

r = radius

let π = 3.14

diameter = 150mm

diameter = radius/2 = 150mm/2

diameter = 75mm

circumference of a circle = 2 × 3.14 × 75

circumference of a circle = 471 mm