Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

A sphere passes through the eight corners of a cube of side 14 cm. Find the volume (in cm3 ) of the sphere. Take π = 22/7

Options:

$4312\sqrt{3}$

$4012\sqrt{3}$

$4312\sqrt{2}$

$4012\sqrt{2}$

Correct Answer:

$4312\sqrt{3}$

Explanation:

We know that,

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

volume of the sphere = \(\frac{4}{3}\)πr3

We have,

Side of the cube = 14cm

According to the question,

Diagonal of the cube = Diameter of the sphere

So, Diagonal of cube = \(\sqrt {3}\) × 14 = 14\(\sqrt {3}\) cm

Now the radius of the sphere = \(\frac{14\sqrt {3}}{2}\) = 7\(\sqrt {3}\)

Now the volume of the sphere = \(\frac{4}{3}\) × \(\frac{22}{7}\) × (7\(\sqrt {3}\))3

= $4312\sqrt{3}$