Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 2D

Question:

The square of the diagonal of a cube is 2175 cm2 . What is the total surface area (in cm ) of the cube?

Options:

4305

4272

4530

4350

Correct Answer:

4350

Explanation:

We know that,

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

TSA of cube = 6s2

Given,

The square of the diagonal of a cube is 2175 cm2.

ATQ,

 (\(\sqrt {3}\) × Side of cube)2 = 2175

= 3s= 2175

= s2= 725

TSA of cube = 6 s2 = 6 × 725 = 4350 cm2