2025 · Q59
Consider the following for the next two (02) items that follow: A pot is made from a hollow sphere of inner radius 20 cm by cutting its upper portion horizontally. The height of the pot is 30 cm. What is the inner radius of the circular opening of the pot so formed?
Elementary MathematicsMensuration
- A10√2 cm
- B15 cm
- C10√3 cm
- D12 cm
Explanation
The rim is 30 − 20 = 10 cm above the sphere's centre, so its radius is √(20² − 10²) = √300 = 10√3 cm, option (c).