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A matchbox is 4 cm long, 2.5 cm broad and 1.5 cm in height. Its outer sides are to be covered exactly with craft paper. How much paper will be required to do so?

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Length of the matchbox (l) = 4 cm, breadth (b) = 2.5 cm, height (h) = 1.5 cm 

∴ Total surface area of the matchbox = 2 (lb + bh + lh)

∴ 39.5 sq. cm paper will be required.

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