Answer: (1/3)πr²h.
- A πr²h
- B (1/3)πr²h
- C (2/3)πr²h
- D (1/2)πr²h
Correct answer: B. (1/3)πr²h
Explanation: Volume of cone = (1/3)πr²h (one-third of cylinder volume).
Three standard 3D solids and their key formulas: a cylinder's volume scales with the full height, a cone's volume is exactly one-third of the cylinder with the same base and height, and a sphere's volume and surface area both follow distinct r-based formulas worth memorising separately.
Concept context
Perimeters, areas, and volumes of 2D and 3D shapes