A picture is painted on cardboard 8 cm long and 5 cm wide such that there is a margin of 1.5 cm along each of its sides then the total area of the margin is ____ ${cm}^{2}$ .

Question

A picture is painted on cardboard 8 cm long and 5 cm wide such that there is a margin of 1.5 cm along each of its sides then the total area of the margin is ____ cm2.

Accepted Answer

Concept: The total area of the margin is

{30 cm}^{2}

. After deducting the length of the margin from the stated length and breadth, we first determine the length and width of the cardboard. Then, since we are aware that the cardboard is rectangular in shape, we utilize the rectangle's formula to determine its area. The appropriate response is then obtained by deducting the area of the margin from it.
On a piece of cardboard that is 8 cm length and 5 cm wide, we have painted a picture. Additionally, there is a 1.5 cm margin on each of its sides.

We must determine the margin's area.
The area of cardboard will be determined by Area=length × width because it is rectangular in shape.
Assuming that length is 8 cm and width is 5 cm
We shall therefore determine that the real area is Area=8×5
Area=40