The length of a rectangle is double of its breadth. if its perimeter is 72 meters, find its area.

Perimeter is the distance around the outside of a shape. For example, if you walk around the edge of a playground, you're measuring its perimeter. Area is the amount of space inside a shape. For example, if you want to put new tiles on your kitchen floor, you need to know the area of the room to know how many tiles to buy. Created by Sal Khan. What I want to do in this video is a fairly straightforward primer on perimeter and area. And I'll do perimeter here on the left, and I'll do area here on the right. And you're probably pretty familiar with these concepts, but we'll revisit it just in case you are not. Perimeter is essentially the distance to go around something or if you were to put a fence around something or if you were to measure-- if you were to put a tape around a figure, how long that tape would be. So for example, let's say I have a rectangle. And a rectangle is a figure that has 4 sides and 4 right angles. So this is a rectangle right here. I have 1, 2, 3, 4 right angles. And it has 4 sides, and the opposite sides are equal in length. So that side is going to be equal in length to that side, and that side is equal in length to that side. And maybe I'll label the points A, B, C, and D. And let's say we know the following. And we know that AB is equal to 7, and we know that BC is equal to 5. And we want to know, what is the perimeter of ABCD? So let me write it down. The perimeter of rectangle ABCD is just going to be equal to the sum of the lengths of the sid...