Rectangle Area Problem: Finding Side Length When Area = 55 and Height = 5.5

Question

The area of the rectangle below is equal to 55.

AC = 5.5

Calculate the length of side AB.

00:00 Find AB

00:03 The formula for calculating rectangle area is width(AB) multiplied by length(AC)

00:07 We'll substitute appropriate values according to the given data and solve for AB

00:14 And this is the solution to the question

The area of a rectangle is equal to its length multiplied by its width.

Hence let's begin by inserting the known data into the formula:

$S=AB\times AC$

$55=AB\times5.5$

Let's now divide both sides by 5.5:

$AB=10$