The area for a circle, is A = πr^2
There is a top and bottom circle so you would multiply that by 2 to get 2πr^2
Now to find the area of the lateral surface you need to find the circumference of the circle ( which would be the length of a rectangle)
The formula for circumference is 2πr, then you need to multiply that by the height so you would have 2πrh ( this is equivalent to length x width).
Now add both equations together to get total surface area:
Surface area = 2πr^2 + 2πrh how does this all work