Find the circumference of a circle with a radius of 5mm. a) 30\pi mm b) 5\pi mm c) 25\pi mm d) 10\pi mm

Question

Find the circumference of a circle with a radius of 5mm.

a) 30
`\pi` mm
b) 5
`\pi` mm
c) 25
`\pi` mm
d) 10
`\pi` mm

Answer 1

C=2πr=2·π·5≈31.41593mm