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Q.

Find the lateral surface area of a cuboid whose dimensions are Question Image Question Image.


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a

Question Image

b

Question Image

c

Question Image

d

Question Image 

answer is B.

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Detailed Solution

Concept- We will use the formula given by Question Image which is known as the lateral surface area of the cuboid.
Here I is the length of the cuboid, Question Image is the breadth and Question Image is the height of the cuboid.
We'll apply the equation provided by Question Image also known as the cuboid's lateral surface area.
We can answer theQuestion with the aid of this formula. I, b, and Question Image represent the cuboid's length, breadth, and height, respectively.
We'll first think about the word "lateral surface" in order to answer the question. The area of the top and the curved surface are actually included when calculating lateral surface. So, by taking into account the cuboid's surface and its area at the top, we may get the lateral surface area. Essentially, the square area provided by the side square determines the area of the cuboid's top.
However, in addition to the area of the square on top of the cuboid, we must also take into account the cuboid's surface if we need to determine the lateral surface area. This can be expressed mathematically as  Question ImageBelow is a diagram that corresponds to the dimensions specified in the question.
Question ImageThe cuboid formula is changed into a new equation by substituting these values for the cuboid's specified length, breadth, and height, which are each symbolized by the letters l, b, and h. The cuboid's length is signified by letters l, 12 cm by b, and 7.5 cm by h. So, we obtain
area of cuboid Question Image Question Image area of cuboid Question Image Question Image area of cuboid Question Image Question Image area of cuboid Question Image Question Image area of cuboid Question ImageConsequently, the cuboid has a 510 centimeter square surface area.
Hence, the correct answer is option 2.
 Syllabus: CBSE
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