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Question

The surface area of a box which is in the form of a cuboid whose dimensions are l × b × h is__________.


A

2(lb + bh + hl)

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B

lb + bh + hl

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C

2(lh + bh)

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D

lh + bh

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Solution

The correct option is A

2(lb + bh + hl)


The surface area of a cuboid is nothing but the total surface area which is the area of 6 rectangular faces {(l,b), (b,h) , (l,h) , (l,b) , (b,h) , (l,h)} .

Total surface area = lb + bh + lh + lb + bh + lh = 2(lb + bh + hl).


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