$\"\"$

Find radius.

The linear speed is $\"\"$ .

Number of rotation in revolutions per minute is $\"\"$ revolutions per minute.

Angle of each rotation is $\"\"$ .

Angle of rotations $\"\"$ radians per minute.

Time $\"\"$ .

The linear speed is $\"\"$ .

Substitute $\"\"$ , $\"\"$ and $\"\"$ in $\"\"$ .

$\"\"$

Radius is $\"\"$ .

$\"\"$

Radius is $\"\"$ .