Question

if dimensions of cuboid are 3cm,4cm and 8cm then its surface area is?

Answer 1

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✤ Required Answer:

✒️ GiveN:

• Dimension of the cuboid = 3 cm, 4 cm and 8 cm

✒️ To FinD:

• Surface area of the cuboid.....?

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✤ How to solve?

This is a apply formula and get answer type of question, so we just need to know the formula for finding the surface area of a cuboid whose dimensions are given.

• Generally surface area simply means total surface area of the cuboid.

$\large{ \cdot{ \boxed{ \rm{TSA\: of \: cuboid = 2(lb + bh + lh)}}}}$

Here,

• l = length
• b = breadth
• h = height

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✤ Solution:

We have,

• Dimensions of the cuboid = 3 cm × 4 cm × 8cm

[ Here, We can choose randomly these dimensions as length or breadth or height of the cuboid because in each of the cases, there would be no change in TSA ]

Let,

• Length = 8 cm
• Breadth = 4 cm
• Height = 3 cm

Finding the TSA,

➝ TSA of the cuboid = 2(lb + bh + lh) cm²

➝ TSA of the cuboid = 2(8×4 + 4×3 + 8×3) cm²

➝ TSA of the cuboid = 2(32 + 12 + 24) cm²

➝ TSA of the cuboid = 2(68) cm²

➝ TSA of the cuboid = 136 cm²

♦️ Surface area of the cuboid = 136 cm²

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Answer 2

Answer:

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