Question

How to calculate the surface area of a cola bottle

Answer 1

So cola bottle is a cylinder.
Surface area of a cylinder: $2 \pi r^{2} + 2 \pi rh$

Answer 2

You can calculate the surface area of a cola bottle by wrapping a paper perfectly around the cola bottle.

The area of the paper becomes the surface area of the cola bottle.

The area of the paper can be found by forming a regular shape such a rectangle from the paper and then use the dimensions to estimate the area.