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Question

Which of the following is correct for a rectangular prism?

A
Total surface area of a rectangular prism > Lateral surface area of a rectangular prism
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B
Total surface area of a rectangular prism < Lateral surface area of a rectangular prism
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C
Total surface area of a rectangular prism = Lateral surface area of a rectangular prism
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D
None of these
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Solution

The correct option is A Total surface area of a rectangular prism > Lateral surface area of a rectangular prism
Let,
Length of the rectangular prism =l

Breadth of the rectangular prism =b

Height of the rectangular prism =h

The lateral surface area of a rectangular prism = 2( l + b) h

The total surface area of a rectangular prism =2(lb)+2(bh)+2(lh)

=2(lb)+2(l+b)h

Total surface area of a rectangular prism =2lb+ lateral surface area of a rectangular prism

Hence, Total surface area of a rectangular prism > lateral surface area of a rectangular prism

The lateral surface area of a rectangular prism is 2(l+b)h.

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