Question

Find the height of a cone with a volume of 21ft and a radius of 4ft​

Answer 1

here's the solution,

volume of cone :

=》

`v = (1)/(3) \pi {r}^(2) h`

=》

`21 = (1)/(3) * 3.14 *4 {}^(2) * h`

=》

`h = (21 * 3)/(3.14 * 16)`

=》

`h = 1.253`

height = 1.25 ft (approximate)