A panting 40 cm long and 28 cm wide is painted on a cardboard such that there is a margin of 2 cm along each of its side. find the total area of the margin.
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Step-by-step explanation:
Area of cardboard = 40×28= 1120cm²
length= 40-4=36cm , Breath= 20-4=16cm
Area = 36×16=576cm²
Total area of margin = 1120 - 576 =544 cm²
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