The volume of a sphere is 48 m3

. What is the volume of a cylinder if its radius is the same as the sphere’s and its height is equal to the sphere’s diameter?(1 point)
m3

1 answer

To solve this problem, we need to first find the radius of the sphere and then use that radius to calculate the volume of the cylinder.

  1. Volume of the Sphere: The formula for the volume of a sphere is given by: \[ V = \frac{4}{3} \pi r^3 \] We are given that the volume \( V \) is 48 m³: \[ \frac{4}{3} \pi r^3 = 48 \]

    To solve for \( r \), rearranging gives: \[ r^3 = \frac{48 \cdot 3}{4 \pi} = \frac{144}{4 \pi} = \frac{36}{\pi} \] Now let's calculate \( r \): \[ r = \left( \frac{36}{\pi} \right)^{1/3} \]

  2. Diameter of the Sphere: The diameter \( d \) of the sphere is: \[ d = 2r \]

  3. Volume of the Cylinder: The formula for the volume of a cylinder is: \[ V = \pi r^2 h \] Where \( h \) is the height. From our previous calculation, the height of the cylinder is equal to the diameter of the sphere, so: \[ h = d = 2r \] Therefore, the volume of the cylinder becomes: \[ V = \pi r^2 (2r) = 2 \pi r^3 \]

  4. Substituting the Volume of the Sphere: We know from the first calculation that \( \frac{4}{3} \pi r^3 = 48 \), which means: \[ r^3 = \frac{36}{\pi} \] Now substituting for \( r^3 \) in the cylinder's volume: \[ V = 2 \pi r^3 = 2 \pi \left( \frac{36}{\pi} \right) \]

  5. Calculating the Volume of the Cylinder: \[ V = 2 \cdot 36 = 72 , \text{m}^3 \]

Thus, the volume of the cylinder is \( \boxed{72 , \text{m}^3} \).