Question

. If the radius of the circular base of a right circular cone is tripled, find the ratio of the volume of the first one to that of the second, the height remaining same.​

Answer 1

Answer:

1:9

Step-by-step explanation:

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Answer 2

Answer:

Radius of base of cone =3r .

Also, Height of cone = radius of base of cone =3r

We know, Volume of cone

=

3

1

πr

2

h=

3

1

×π×(3r)

2

×3r

=

3

1

×π×27r

3

=9πr

3

.

Hence, option D is correct.