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A sphere and a hemisphere have the same ...

A sphere and a hemisphere have the same radius. Then the ratio of their respective total surface areas is

A

`4:3`

B

`3:4`

C

`2:1`

D

`1:2`

Text Solution

Verified by Experts

The correct Answer is:
A
माना कि गोलक तथा गोलार्ध की त्रिज्या =r
`("गोलक का कुल पृष्ठ क्षे०")/("गोलार्ध का कुल पृष्ठ क्षे०") =(4pi r^(2))/(3pi r^(2))=4:3`
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