High School

The radius of a cone is 2.5 units. The volume of the cone is 19 cubic units. Complete the expression that represents the height of the cone.

Given numbers: 57, 7.5, 2.5, 6.25

(Note: Drag each number to the correct location on the fraction. Not all numbers will be used.)

Answer :

We start with the formula for the volume of a cone:

[tex]$$
V = \frac{1}{3}\pi r^2 h.
$$[/tex]

Given that the volume is [tex]$19$[/tex] cubic units and the radius is [tex]$2.5$[/tex], we substitute these values into the formula:

[tex]$$
19 = \frac{1}{3}\pi (2.5)^2 h.
$$[/tex]

First, compute the square of the radius:

[tex]$$
(2.5)^2 = 6.25.
$$[/tex]

Now the equation becomes:

[tex]$$
19 = \frac{1}{3}\pi (6.25) h.
$$[/tex]

To solve for [tex]$h$[/tex], multiply both sides of the equation by [tex]$3$[/tex]:

[tex]$$
3 \times 19 = \pi (6.25) h.
$$[/tex]

This simplifies to:

[tex]$$
57 = 6.25\pi\, h.
$$[/tex]

Finally, isolate [tex]$h$[/tex] by dividing both sides by [tex]$6.25\pi$[/tex]:

[tex]$$
h = \frac{57}{6.25\pi}.
$$[/tex]

Thus, the expression representing the height of the cone is:

[tex]$$
\boxed{\frac{57}{6.25\pi}}.
$$[/tex]