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The radius of the base of a right circular cone is 6 cm and its slant height is 10 cm. Then its volume is Use π = 22/7)
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- 301.71 cm.³
- 310.71 cm.³
- 301.17 cm.³
- 310.17 cm.³
- 301.71 cm.³
Correct Option: A
Slant height of cone = l cm. = 10 cm.
Radius of base = r = 6 cm.
∴ h = √l² - r²
= √10² - 6² = √(10 + 6)(10 - 6)
= √16 × 4 = 4 × 2 = 8 cm.
| ∴ Volume of cone = | πr²h | |
| 3 |
| = |  | × | × 6 × 6 × 8 |  | cubic unit | ||
| 3 | 7 |
| = | = 301.71 cu. cm. | |
| 21 |
