Question

Question 3
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

Length of painted cardboard = 8 cm and breadth of painted card = 5 m
Since, there is a margin of 1.5 cm long from each of its side.
Therefore reduced length = 8 - (1.5 + 1.5) = 8-3 = 5 cm
And reduced breadth = 5 - (1.5+1.5)=5-3= 2 cm
$\therefore$ Area of margin = Area of cardboard (ABCD) - Area of cardboard (EFGH)
$=(AB\times AD)-(EF\times EH)$
$=(8\times 5)-(5\times 2)$
= 40 - 10
$=30c{m}^2$
Thus, the total area of margin is 30 $c{m}^2$ .