Question

3. A picture is painted on a cardboard 8 cm long and 5 cm wide such that there is a
margin of 1.5 cm along each of its sides. Find the total area of the margin.
B
anato
om which is 55 m​

Answer 1

Step-by-step explanation:

Length of painted cardboard=8 cm and breadth of painted card =5cm

Since, there is a margin of 1.5cm long from each of its side.

Therefore reduced length

=8−(1.5+1.5)=8−3=5cm

And reduced breadth

=5−(1.5+1.5)=5−3=2cm

∴ Area of margin=Area of cardboard(ABCD)−Area of cardboard(EFGH)

=(AB×AD)−(EF×EH)

=(8×5)−(5×2)

=40−10

=30cm

2