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What are respectively the curved surface...

What are respectively the curved surface area and volume of a hemisphere of radius 21cm? `(pi=22/7)`
त्रिज्या 21 सेमी वाले अर्धगोले का वक्र पृष्ठ क्षेत्रफल एवं आयतन ( क्रमशः ) ज्ञात करें |

A

`2772 cm^2`, `19404 cm^3`

B

`4158 cm^2`, `19404 cm^3`

C

`2772 cm^2`, `4158 cm^3`

D

`2772 cm^2`, `9702 cm^3 `

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