Multiple choice

The curved surface area of a right circular cone of radius 11.3 cm. is 355 cm2. What is the slant height of the cone?

  1. 5 cm

  2. 7 cm

  3. 10 cm

  4. 12 cm
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Curved surface area of cone = πrl where r is radius and l is slant height. Given CSA = 355 cm² and r = 11.3 cm. Therefore l = 355/(π×11.3) = 355/35.5 = 10 cm (using π ≈ 3.14, π×11.3 ≈ 35.5).

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