Question

The formula A-lw is used to calculate the area A of a rectangular surface using the length and the width

(w) of the surface. Which formula could be used to find w in terms of A and I?

Answer 1

The area of a rectangle is the product of the two sides. One side is the height of the can, the other side is the perimeter of the circle, since the label wraps once around the can. So the area of the rectangle is (2 pi r)* h.