SSC GD Constable 6 Feb 2025 Shift 1 Paper

Curved Surface Area of Hemisphere $=2\times \mathit{\pi }\times {\mathit{r}}^2$
Base Area of Hemisphere $=\mathit{\pi }\times {\mathit{r}}^2$
Total Area to be painted $=2\times$ Curved Surface Area
Calculation:
Curved Surface Area $=2\times \left(22∕7\right)\times 3.5\times 3.5=77\mathit{c}{\mathit{m}}^2$
Total Area to be painted $=77+77=154\mathit{c}{\mathit{m}}^2$
Cost of painting $=\left(154\times 15\right)∕10=\mathit{₹}231$