### Home > CAAC > Chapter 1 > Lesson 1.1.3 > Problem 1-23

1-23.

The area of a rectangle is the product of the length and width.

Substitute the area and the unknown length or the width into the equation A = *l* · *w*.

Solve for the unknown variable.

Try not to be confused by the orientation of the rectangle. Solve as in part (a).

See the example below.