Math Problem Statement
A ball of radius 10 has a round hole of radius 3 drilled through its center. Find the volume of the resulting solid.
Solution
To find the volume of the solid resulting from drilling a cylindrical hole through a sphere, we can use the method of cylindrical shells or symmetry. However, there's a specific formula for this type of problem, often referred to as the volume of a spherical segment with a cylindrical hole:
Step 1: Visualize the problem
Imagine a sphere with radius and a cylindrical hole drilled through its center with radius . The length of the hole is equal to the diameter of the sphere, and the height of the cylinder will extend across the entire diameter of the sphere.
Step 2: Set up the integral
The volume of the spherical segment with a cylindrical hole can be computed by subtracting the volume of the cylindrical hole from the volume of the spherical cap it removes.
However, we can also compute this using the following standard formula for a spherical segment with height and hole radius (if ):
Where is the distance from the center of the sphere to the edge of the cylindrical hole.
Step 3: Calculate the height
The height of the spherical cap is related to the sphere’s radius and the hole’s radius by:
Substitute the values and :
Step 4: Compute the volume of the resulting solid
The volume of the cylindrical hole itself can be determined by subtracting the volume of the solid portion of the sphere from the volume of the entire sphere:
First, calculate the total volume of the sphere:
Now, compute the volume of the cylindrical hole:
Final Volume of the Resulting Solid:
Subtract the volume of the cylindrical hole from the volume of the sphere:
Thus, the volume of the resulting solid is:
Would you like to go over any specific step in detail?
Related Questions:
- How would the volume change if the hole’s radius was increased?
- What is the surface area of the resulting solid after the hole is drilled?
- Can this method be extended to ellipsoids instead of spheres?
- How does the volume change if the hole is not drilled through the center?
- What happens to the volume if the sphere is sliced instead of having a hole drilled?
Tip: Always double-check your setup when dealing with three-dimensional geometry problems, especially when applying integrals or standard formulas!
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Math Problem Analysis
Mathematical Concepts
Geometry
Volume of solids
Spherical geometry
Formulas
Volume of sphere
Volume of cylindrical hole
Volume of spherical segment with cylindrical hole
Theorems
-
Suitable Grade Level
Advanced High School
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