Question

* 16 per m.
7. A painting 40 cm long and 28 cm wide is painted on a cardboard such that ther
margin of 2 cm along each of its sides. Find the total area of the margin.
flower hed is 3 m 80 cm long. It is extended by digging​

Answer 1

Answer:

Solution :-

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

Answer.