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Question

Which of the following option is correct?

S1 : Total surface area of a cuboid is the sum of areas of 4 faces excluding top and bottom faces.

S2 : Lateral surface area of a cuboid is the sum of areas of 4 faces excluding top and bottom faces.

S3 : Area of a face of a cuboid is of the form xy, where x and y are length and breadth respectively.


A

S1 , S3 are true

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B

S2 , S3 are false

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C

S1 and S3 are false

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D

S2 and S3 are true

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Solution

The correct option is D

S2 and S3 are true


A cuboid has 6 faces.

Total surface area is defined as the sum of the areas of all 6 faces.

Lateral surface area is defined as the sum of areas of 4 faces which excludes the area of the top and bottom faces.

Area of a face of a cuboid = lb

Where l is the length of that face of the cuboid, b is the breadth of that face of the cuboid


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