Answer: πR²h - πr²h.
- A πR²h - πr²h
- B π(R+r)h
- C πh(R-r)²
- D 2π(R+r)h
Correct answer: A. πR²h - πr²h
Explanation: Volume = πR²h - πr²h = πh(R² - r²) = πh(R+r)(R-r).
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