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

Answer:

area of cardboard= 8×5=40

area of picture=(8-3)×(5×3)=10

area of margin=40-10=30cm²