Q. 73.5( 4 Votes )

If the radius of the base of a right circular cone is 3r and its height is equal to the radius of the base, then its volume is
A. πr3

B. πr3

C. 3πr3

D. 9πr3

Answer :

We have,


Radius of base of cone = 3r


Height of cone = 3r


Volume of cone =


= 9πr3

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