Question

a painting 8cm long and 5 cm wide is painted on a cardboard such that there is a margin of 1 cm along each of its sides find the total area of the margin​

Answer 1

Answer:

Area of Margin = 30 cm²

Step-by-step explanation:

Painting  is 8cm long and 5 cm wide

Painting Area = 8 * 5 = 40 cm²

There is a margin of 1 cm on each side

so cardboard size = 8 + 1 + 1 = 10 cm  and  5 + 1 + 1 = 7 cm

Cardboard size Area = 10 * 7 = 70 cm²

Area of Margin = Card board Area - Painting Area

=> Area of Margin = 70 - 40

=> Area of Margin = 30 cm²