SSC CGL 2022 PYQ — Question 22

The correct answer is option 3 i.e. 22$\sqrt{85}$

Here it is given that,

The volume of a right circular cone is 308 cm³ .

1/3 × 22/7 × 7 × 7 × h = 308

h = 6

Slant height = $\sqrt{r^2 + h^2}$ = $\sqrt{7^2 + 6^2} = \sqrt{85}$

Curved surface area of cone = 22/7 × 7 × $\sqrt{85}$ =  22$\sqrt{85}$.