How much sheet (in cm²) will be nee

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

How much sheet (in cm²) will be needed to construct a cuboid of dimensions 10cm x 8cm x 6cm, if the lid is kept open?

Options:

225 cm²

270 cm²

296 cm²

156 cm²

Correct Answer:

296 cm²

Explanation:

Sheet required to build such cuboid = surface area of 4 lateral sides + area of bottom

= 2 h (l + b) + lb

= 2 × 6 (10 + 8) + (10 × 8)

= 216 + 80 = 296 cm²