Find the perimeter of a cylinder

Given diameter and height, find the perimeter of a cylinder.
Perimeter is the length of the outline of a two - dimensional shape. A cylinder is a three - dimensional shape. So, technically we cannot find the perimeter of a cylinder but we can find the perimeter of the cross-section of the cylinder. This can be done by creating the projection on its base, thus, creating the projection on its side, then the shape would be reduced to a rectangle.
 

👁 perimeter of a cylinder

Formula : 
Perimeter of cylinder ( P ) = 
here d is the diameter of the cylinder 
h is the height of the cylinder
Examples : 
 

Input : diameter = 5, height = 10 
Output : Perimeter = 30

Input : diameter = 50, height = 150 
Output : Perimeter = 400

 

 

Output : 
 

Perimeter = 30 units

Time Complexity: O(1) 
Auxiliary Space: O(1)