The circumference of the base of a right circular cone is 44 cm and its height is 24 cm. The curved surface area (in cm²) of the cone is:

Solution (By Examveda Team)

$$\eqalign{ & 2\pi r = 44 \cr & 2 \times \frac{{22}}{7} \times r = 44 \cr & r = 7 \cr & {\text{Curved surface area}} = \pi rl \cr & = \frac{{22}}{7} \times 7 \times 25 \cr & = 550{\text{ c}}{{\text{m}}^2} \cr} $$