The length, breadth and height of a cubo

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

The length, breadth and height of a cuboid are 5 cm, 2 cm and 4 cm respectively. What is the total surface area of the cuboid?

Options:

84 cm²

152 cm²

38 cm²

76 cm²

Correct Answer:

76 cm²

Explanation:

We know that,

Total surface area of the cuboid = 2(lb + bh + hl)

We have,

L = 5 cm

b = 2 cm

h = 4 cm.

Total surface area of the cuboid = 2(5 × 2 + 2 × 4 + 4 × 5) = 2 (10 + 8 + 20) = 2 × 38 = 76 cm²