Multiple choice

Find the volume of the right circular cone with radius 3.5 cm and height 12 cm.

  1. 308 cm3

  2. 154 cm3

  3. 77 cm3

  4. 231 cm3
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volume of cone = (1/3)πr²h. Given r = 3.5 cm = 7/2 cm, h = 12 cm. V = (1/3) × (22/7) × (7/2)² × 12 = (1/3) × (22/7) × (49/4) × 12 = 22 × 7 = 154 cm³. Option A (308) would be without the 1/3 factor, option C (77) uses 6 instead of 12, and option D (231) is miscalculated.

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