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The volume of a solid hemispherical object is 19404 cm3. Its total surface area is –1). 4158 cm22). 4923 cm23). 4518 cm24). 4815 cm2 |
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Answer» Total surface area of solid hemisphere = 3πr2 And VOLUME of solid hemisphere $(= \frac{2}{3}{\rm{\pi }}{r^3})$ Where, r = RADIUS of the solid hemisphere Given, Volume of solid hemisphere = 19404 ⇒ (2/3)πr3 = 19404 ⇒ (2/3) × (22/7) × r3 = 19404 ⇒ r3 = (19404 × 3 ×7)/(2 × 22) = 9261 ⇒ r = 21 cm ∴ Total surface area = 3πr2 = 3 × (22/7) × (21)2 cm2 = 4158 cm2 |
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