2014 · Q91
The diameter of the base of a cone is 6 cm, altitude is 4 cm. What is the approximate curved surface area of the cone?
Elementary MathematicsMensuration
- A45 square cm
- B47 square cm
- C49 square cm
- D51 square cm
Explanation
Slant height = 5 cm; curved area = π x 3 x 5 ≈ 47.1 cm^2.