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 :

=》

$v = \dfrac{1}{3} \pi {r}^{2} h$

=》

$21 = \dfrac{1}{3} \times 3.14 \times4 {}^{2} \times h$

=》

$h = \dfrac{21 \times 3}{3.14 \times 16}$

=》

$h = 1.253$

height = 1.25 ft (approximate)