A picture is painted on a cardboard 8cm long and 5cm wide such that there is a margin of 1.5cm along each of its sides. Find the total area of margin. The answer behind the book is 30cm but I am not understanding how to do it. pls help me pls
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Area of picture:
L=8-(1.5+1.5)
B=5-(1.5+1.5)
Area=5×2=10
Area of cardboard=8×5=40
Area of margin=40-10=30
Answer is 30 cm square
L=8-(1.5+1.5)
B=5-(1.5+1.5)
Area=5×2=10
Area of cardboard=8×5=40
Area of margin=40-10=30
Answer is 30 cm square
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