Sum of lengths of all edges of a cube is

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Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

Sum of lengths of all edges of a cube is 84 cm, find its volume:-

Options:

686 cm³

343 cm³

171.5 cm³

514.5 cm³

Correct Answer:

343 cm³

Explanation:

Side of a cube = a

Total edges in a cube = 12

ATQ,

Sum of all edges = 84

12a = 84

a = 7

Volume of cube = a³= 7³= 343 cm³