Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

How many solid spheres of radius 3 cm can be formed by melting a bigger solid sphere of radius 24 cm?

Options:

512

128

64

256

Correct Answer:

512

Explanation:

We know that,

The volume of sphere = \(\frac{4}{3}\) × π × r3

We have,

The radius of each small sphere = 3 cm

Radius of big sphere = 24 cm

Let the number of small spheres = x

According to the question,

= \(\frac{4}{3}\) × π × 243 = x × \(\frac{4}{3}\) × π × 33

= x = 512