Acosmetics company that makes small cylindrical bars of soap wraps the bars in plastic prior to shipping. find the surface area of a bar of soap if the diameter is 5cm and the height is 2cm.

We would have two circles of 5cm diameter each, and a rectangle of the length pi*diameter and 2cm, so lets add them:
total = 2circles + rectangle
total = 2(2*pi*(5/2)^2) + pi*diameter*heigth
= 4*pi*(2.5)^2 + pi*5*2
= 109.9
that is the surface area of a bar soap 109.9 cm^2