Question

9. A painting 40 cm long and 28 cm wide is pasted on a cardboard such that there is a margin of 2 cm alom
each of its sides. Find the total area of the margin.​

Answer 1

Answer:

Total length of the painting including the margin = 40 cm

Total width of the painting including the margin = 28 cm

Area of the painting including the margin = 40*28  

Area of the painting including the margin = 1120 sq cm

Length of the painting without the margin = 40 - (2 + 2)

= 40 - 4

= 36 cm

Width of the painting without the margin = 28 - (2 + 2)  

= 28 - 4  

= 24 cm

Area of the painting without the margin = 36*24

Area of the painting without the margin = 864 sq cm

Area of the margin = Area of the painting including the margin - Area of the painting without the margin

⇒ 1120 - 864

= 256 sq cm

So, the total area of the margin is 256 sq cm

Step-by-step explanation:

Answer 2

Answer:

288cm²

Step-by-step explanation:

I have done the whole process in the pic

Hope it helps