Practicing Success

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 2D

Question:

Find the volume of a hemisphere of radius 21 cm. (Use π=22/7)

Options:

19400 cm3

18440 cm3

17404 cm3

19404 cm3

Correct Answer:

19404 cm3

Explanation:

We know that,

Volume of hemisphere = (\(\frac{2}{3}\))πR3

We  have,

Radius of hemisphere = 21 cm

Volume of hemisphere  = \(\frac{2}{3}\) × \(\frac{22}{7}\) × 21 × 21 × 21

=  \(\frac{2}{3}\) × \(\frac{22}{7}\) × 9261 = 19404 cm3