Question

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

Answer 1

Circumference of circle=`2pir`

Where `r=radius`

`2r=d`

`d=diameter`

So,`2pir=pid`

Note,`pi=22/7`

In this statement,`c=ci` `rcumference`

`rarrc=pid`

`rarrc=pi(30)`

`rarrc=pi30=22/7(30)`

`rarrc=660/7=94.28...`

Circumference is `94.28...cms`