Question

Sameera is making a painting of dimensions 48 cm x 32 cm on a canvas leaving a margin of 4 cm all around. If the margin is to be painted with black colour, find the area to be painted black​

Answer 1

Answer:

160cm

Step-by-step explanation:

If the margin is to be painted, that means its perimeter

so perimeter of a rectangle- 2(l+b)

After replacing,

2(48+32)

=> 160cm

Therefore she has to paint 160cm in total

Answer 2

Length = 48-4-4

              = 40 cm

Breadth = 32-4-4

                = 24 cm

ஃ Painting area = l x b

                             = 40 x 24

                             = 960 $cm^{2}$

   Remaining area = ( 48x32 ) - ( 40x24 )

                               = 1536 - 960

                               = 576 $cm^{2}$