Teaching Bihar D.El.Ed Mock Test Series 2024-25 Quantitative Aptitude Mensuration Solid Figures

The total surface area of a hollow metal cylinder, open at both ends of external radius 6 cm and height 8 cm, is 200 π cm2. The thickness of the metal in the cylinder is

1
3 cm
2
5 cm
3
4 cm
4
2 cm
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