Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

The volume of a cube is 3375 cm3. What is the length of the longest rod that can be placed in this cube?

Options:

15 cm

15$\sqrt{3}$ cm

45 cm

12$\sqrt{3}$ cm

Correct Answer:

15$\sqrt{3}$ cm

Explanation:

We know that,

The volume of cube = side3

Diagonal of cubes = \(\sqrt {3}\) × Side of cube

We have,

The volume of cube = 3375 cm3

= side3 = 3375 cm3

= side = 15 cm

length of the longest rod = \(\sqrt {3}\) × Side of cube = 15\(\sqrt {3}\) cm