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.


It is given in the question that,


Length of cardboard = 8 cm


Breadth of cardboard = 5 cm


We know that,


Area of rectangle = Length × Breadth


Area of cardboard including margin = 8 × 5


= 40 cm2



From the figure, it can be observed that the new length and breadth of the given cardboard (When margin is not included) is 5 cm and 2 cm respectively


Area of cardboard not including margin = 5 × 2


= 10 cm2


Area of the margin = Area of the cardboard including the margin – Area of cardboard not including margin


= 40 – 10


= 30 cm2


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