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The area of the base of a right circular...

The area of the base of a right circular cone is `81 pi cm^2` and its height is 12cm. What is the curved surface area (in `cm^2`) of the cone ?
एक गोलाकार शंकु के आधार का क्षेत्रफल `81 pi cm^2` सेमी है और इसकी ऊंचाई 12 cm है। शंकु का घुमावदार सतह क्षेत्रफल (`cm^2` में ) क्या है?

A

`144pi`

B

`108pi`

C

`126pi`

D

`135pi`

Text Solution

Verified by Experts

The correct Answer is:
D
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