: A poster measuring (20x16) cm is pasted on a sheet of cardboard such that there is a margin of 3.5cm along each side of the poster. Find the total area of the margin.
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Answer:
138.25cm²
Step-by-step explanation:
Length of the poster = 20 cm
Breadth of the poster = 16 cm
Area of the poster
= L x B
= 20 x 16
= 320 cm²
Length of the poster with margin = 23.5 cm
Breadth of the poster with margin = 19.5 cm
Area of the poster with margin
= L x B
= 23.5 x 19.5
= 458.25
Area of the margin = Area of the poster with margin - Area of the poster
=> 458.25 - 320
=> 138.25 cm²
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