Question

a picture is painted on a cardboard 12 cm long and 9cm wide such that there is a margin of 2cm along each of its sides. Find the total area of the margin.​

Answer 1

Answer:

$38 {cm}^{2}$

Step-by-step explanation:

Without margin

L=12cm

B=9cm

Area=l*b

=12*9

=108cm^2

With margin :

L=10cm

B=7cm

Area=l*b

=10*7

=70cm^2

Area of margin=area without margin-area with margin

=(108-70)cm^2

=38cm^2