Question

A turntable has a diameter of 40 cm what its circumference

Answer 1

Circumference of turntable is 125.6 cm

Explanation:

Diameter of turntable = 40 cm

We need to find circumference of turntable.

The formula used to calculate circumference is:
`Circumference=2\pi r`

where r is radius

We know that:
`radius=(diameter)/(2)`

Finding radius first:

`radius=(diameter)/(2)\\radius=(40)/(2)\\radius = 20 \ cm`

So, radius r=20 cm

Now finding circumference

`Circumference=2\pi r\\Circumference=2*3.14*20\\Circumference=125.6 \ cm`

So, circumference of turntable is 125.6 cm