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Question

The surface area of a box, which is in the shape of a cuboid, and 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 nothiing but its total surface area, which is the outer area of the cuboid's 6 rectangular plates (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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