Question

What's the circumference of a circle with a diameter of 45 cm Centimeters?

Answer 1

D=45
r=45/2
circumfrence=2Πr
2*22/7*45/2
141.4 cm

Answer 2

Heya,

According to the question,

Diameter of circle = 45 cm

So, radius of circle = 45/2 cm

= 22.5 cm

So,

Circumference of circle = 2πr

= 2×22/7×22.5

= 990/7

= 141.428571 cm

Hope this helps....:)