The slant height of a right circular cone is 10 m and its height is 8 m. Find the area of its curved surface.

1.

The slant height of a right circular cone is 10 m and its height is 8 m. Find the area of its curved surface.

[A].	30 m2
[B].	40 m2
[C].	60 m2
[D].	80 m2

Answer: Option C

Explanation:

l = 10 m,

h = 8 m.

So, r = l² - h² = (10)² - 8² = 6 m.

Curved surface area = rl = ( x 6 x 10) m² = 60 m².

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