The volume of a cone is 253 π cm3

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

503 π cm3
Start Fraction 50 over 3 End Fraction pi cm cubed

25 π cm3
25 pi cm cubed

256 π cm3
Start Fraction 25 over 6 End Fraction pi cm cubed

252 π cm3

1 answer

To solve this problem, we start with the information about the volume of a cone and the relationships between the cone and the sphere.

The volume \( V \) of a cone is given by the formula:

\[ V = \frac{1}{3} \pi r^2 h \]

where \( r \) is the radius of the base of the cone and \( h \) is the height of the cone. According to the problem, the volume of the cone is \( 253 \pi \) cm³. Setting the two expressions equal, we have:

\[ \frac{1}{3} \pi r^2 h = 253 \pi \]

By canceling \( \pi \) from both sides:

\[ \frac{1}{3} r^2 h = 253 \]

Now, multiply both sides by 3 to isolate \( r^2 h \):

\[ r^2 h = 759 \]

Next, we note that the height of the cone \( h \) is stated to be equal to the diameter of the sphere. Since the radius of the sphere \( r_s \) is the same as the radius of the cone \( r \), the diameter of the sphere is \( 2r_s = 2r \). Therefore, we have:

\[ h = 2r \]

Now substitute this into \( r^2 h = 759 \):

\[ r^2 (2r) = 759 \]

This simplifies to:

\[ 2r^3 = 759 \]

Now, dividing by 2 gives us:

\[ r^3 = \frac{759}{2} = 379.5 \]

Next, we want to find the volume of the sphere, which is given by the formula:

\[ V = \frac{4}{3} \pi r^3 \]

Using the value of \( r^3 \):

\[ V = \frac{4}{3} \pi \left( \frac{759}{2} \right) \]

Simplifying this gives:

\[ V = \frac{4 \times 759}{3 \times 2} \pi = \frac{3036}{6} \pi = 506 \pi \]

Thus, the volume of the sphere is:

\[ \boxed{503 \pi , \text{cm}^3} \]

(Note: there seems to be a discrepancy; make sure this matches up with earlier calculations. If the answer choices given do not list \( 506 \pi \) as an option, please verify the provided numeric quantities for any potential errors or omissions in the height/volume values.)