The radii of two circular faces of a fru

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Home Questions CUMKHAR273

Target Exam

CUET

Subject

General Test

Chapter

Quantitative Reasoning

Topic

Mensuration: 3D

Question:

The radii of two circular faces of a frustum of a cone are 12 cm and 9 cm. If the height of the frustum is 21 cm, find its volume. -

Options:

7239 cm³

7326 cm³

6954 cm³

7639 cm³

Correct Answer:

7326 cm³

Explanation:

Volume of frustum = \(\frac{\pi h}{3}\) (R² + Rr + r²) = \(\frac{22 \times 21}{7 \times 3}\) (144 + 108 + 81)

= 7326 cm³