The width of the rectangle is half of its length. Calculate the area if the length of the rectangle is 20m.

First, find the width of the given rectangle.

Since it is half the length, for this we multiply 20 cm by 1/2 part.

We get:

20 * 1/2 = 20/2 = 10 cm.

To find the area of a rectangle, multiply the length of the shape by the width of the rectangle.

As a result, we get:

20 * 10 = 200 cm2

The perimeter of the rectangle will be:

20 + 10 + 20 + 10 = 40 + 20 = 60 cm.

Or:

2 * (20 + 10) = 2 * 30 = 60 cm.

Answer: The area of the rectangle is 200 cm2