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प्रश्न
The volume of a hemisphere is 19404 cm3. The total surface area of the hemisphere is
पर्याय
4158 cm2
16632 cm2
8316 cm2
3696 cm2
MCQ
उत्तर
4158 cm2
Volume of hemisphere `=2/3pi"r"^3`
Therefore,
`2/3pi"r"^3 = 19404`
`=> 2/3xx22/7xx"r"^3 = 19404`
`=> "r"^3 = (19404 xx 21/44)`
⇒ r3 = (21)3
⇒ r =21 cm
Hence, the total surface area of the hemisphere = 3πr2
`=(3xx22/7xx21xx21) "cm"^2`
= 4158 cm2
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