Use the relationship among the formulas for the volumes of cones, cylinders, and spheres to solve the following problem. The volume of a cylinder is 36 cm3

. What is the volume of a sphere if its radius is the same as the cylinder’s and the height of the cylinder is equal to the sphere’s diameter?(1 point)
Responses

18 cm3
18 cm cubed

24 cm3
24 cm cubed

54 cm3
54 cm cubed

12 cm3

1 answer

To solve this problem, we first need to understand the relationships and formulas for the volumes of a cylinder, a cone, and a sphere.

  1. Cylinder Volume Formula: \[ V_{cylinder} = \pi r^2 h \]

  2. Sphere Volume Formula: \[ V_{sphere} = \frac{4}{3} \pi r^3 \]

Given that the volume of the cylinder is 36 cm³, we can express it as: \[ \pi r^2 h = 36 \]

Next, we know that the height of the cylinder (h) is equal to the diameter of the sphere. Since the diameter of the sphere is \(2r\), we have: \[ h = 2r \]

Substituting \(h\) in the cylinder's volume formula: \[ \pi r^2 (2r) = 36 \] \[ 2\pi r^3 = 36 \]

To find the radius, we can rearrange this equation: \[ \pi r^3 = 18 \] \[ r^3 = \frac{18}{\pi} \]

Now, we can find the volume of the sphere: \[ V_{sphere} = \frac{4}{3} \pi r^3 \] Substituting the value of \(r^3\): \[ V_{sphere} = \frac{4}{3} \pi \left(\frac{18}{\pi}\right) \] \[ = \frac{4 \cdot 18}{3} \] \[ = \frac{72}{3} \] \[ = 24 \text{ cm}^3 \]

Thus, the volume of the sphere, given the radius and the relationship to the cylinder's dimensions, is \(24 \text{ cm}^3\).

So the correct response is: 24 cm³