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The curved surface area of a hemisphere ...

The curved surface area of a hemisphere with radius 7cm is:
7 सेमी त्रिज्या वाले एक अर्धगोले का वक्र पृष्ठ क्षेत्रफल कितना होगा ?

A

`308 cm^2`

B

`616 cm^2`

C

`462 cm^2`

D

`385 cm^2`

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