Find the curved surface area of cone whose height is 3 m and radius is 4 m.
(approximate value) (The value of π = $$\frac{22}{7}$$​)

Correct option is A

Given:
Height = 3 m
Radius = 4 m
Formula Used:
CSA of cone = π × r × l
where slant height, $$l = \sqrt{r^2 + h^2}$$​​
Solution:
l = $$\sqrt {3^2 + 4^2} = 5$$​​
CSA of the cone = $$\frac{22 \times 4 \times 5}{7} = 62.85$$​​
∴ CSA of the cone ≈ 63 sq m