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The radius of a cone is r unit and its ...

The radius of a cone is r unit and its slant height is l unit . If the curved surface area of the cone be equal to the total surface area of a sphere of same radius , then the height of the cone will be

A

`sqrt(15) ` r unit

B

`sqrt(12)` r unit

C

`sqrt(10)` r unit

D

`sqrt(17)` r unit

Text Solution

Verified by Experts

The correct Answer is:
A
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