Question

a picture is painted on a cardboard 8 centimetre long and 5 cm wide such that there is a margin margin of 1.5 CM along each of its side find the total area of the margin

Answer 1

length of margin = 8-1.5 =6.5 cm
breadth of margin= 5- 1.5 =3.5 cm

area of margin= l*b = 6.5*3.5
                               =25.25 sq. cm

Answer 2

given
length = 8cm
width= 5cm
margin= 1.5 cm
area of the cardboard = (8 * 5) cm sq.
=40 cm sq
Now
excluding margin,
length= 8 - 1.5 cm
=6.5 cm
width= 5 - 1.5 cm
=3.5 cm
therefore new area= 6.5 * 3.5
= 22.75 cm sq
area of margin = 40 - 22.75
=27.25 cm sq