Multiple choice

The curved surface area of a right circular cone, whose base radius is 3 cm and slant height is 4 cm, is

  1. 24π cm2

  2. 12π cm2

  3. 48π cm2

  4. 21π cm2
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The curved surface area of a cone is pi * r * l, where r is the radius and l is the slant height. CSA = pi * 3 * 4 = 12pi.

AI explanation

The curved surface area of a right circular cone is given by the formula pi * r * l. Substituting the base radius of 3 cm and slant height of 4 cm gives pi * 3 * 4. This calculates to 12 * pi. The result is 12 * pi cm2.

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