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

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

Solution:
Here, l = 10m
h = 8m

So, r = √(l² - h²)
= √(10² - 8²)
=√(100 - 64)
= √36
= 6

∴Curved surface area = πrl
= (π × 6 × 10) m² = 60π m²