Question

If the height and the radius of a cone are doubled, then the volume of the cone becomes​

Answer 1

Step-by-step explanation:

let the Height of the  cone=h am

Radius of the cone=r  cm

Then volume of the cone=31πr2h

If the height and radius are double then

Height=2h

Radius=2r

Then new volume=31π(2r)2×2h

⇒31π×4r×2h=8×31πr2h

Hence it is 8 times of the old volume

Answer 2

Step-by-step explanation:

to find = If the height and the radius of a cone are doubled, the volume of the cone becomes

answer=

• let the height = 2h
• let the radius =2r
• then the volume of cone=31πr2h

solutions =

=13π(2r)2(2h)

=8

hence volume of cone become 8 times