Question

The radius of a cone is decreased to one-third of the original. If volume remain
the same then the length will be increased
of the original
a. 9 times
b. 3 times
c. 27 times
d. 6 times​

Answer 1

Answer:

9 times

Step-by-step explanation:

i hope it will be helpful

Answer 2

Answer:

Wire is in the shape of a cylinder.

Let the radius of the original cylinder =r cm and height =h cm

Original volume =πr

2

h

New Radius after decrease =

3

r

Let the new height be H.

Given, πr

2

h=π(

3

r

)

2

H

H=9h

Hence, the height becomes 9 times.