Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test Quantitative Aptitude Mensuration Plane Figures
The internal and external radii of a hollow metallic cylinder are 1.1 cm and 4.3 cm, respectively, and its height is 16\(\frac{2}{3}\) cm. It is melted and recast into a sphere. The surface area (in cm²) of the sphere is:
1
144 π
2
256 π
3
196 π
4
More than one of the above
5
None of the above