Question

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.

Answer 1

Area of cardboard = l × b

l = 8 cm b = 5 cm Margin = 1.5 cm

Area of picture = l × b

l = 8 = (1.5 + 1.5) = 5 cms b = 5 = (1.5 + 1.5) = 2 cms

Area = l × b = 5 × 2

Area of margin = Area of Cardboard – Area of picture

= 40 – 10 = 30 sq cms