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A hemispherical dome is open from its ba...

A hemispherical dome is open from its base and is made up of iron. Thickness of dome is 3.5 meter. Total cost of painting dome's outer curved surface is Rs 2464. If the rate of painting is Rs 8 per `meter^2`, then what is the volume (in `meter^3`) of iron used in making the dome ?
एक अर्धगोलाकार गुम्बद अपने आधार से खुला है तथा लोहे से बना है। गुम्बद को मोटाई 3.5 मीटर है। गुम्बद के बाहर की वक्रीय सतह को पेंट करने में कुल 2464 रूपये का खर्चा होता है। यदि पेंटिंग की दर 8 रूपये प्रति `मीटर^2` है, तो गुम्बद को बनाने में प्रयोग हुए लोहे का आयतन (`मीटर^3` में) क्या होगा?

A

`656.42`

B

`614.21`

C

`524.46`

D

`628.83`

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The correct Answer is:
B, C
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