Answer: 4.
- A 3
- B 4
- C 5
- D 1
Correct answer: B. 4
Explanation: Centre (3, 4), radius √(9 + 16 − 24) = 1. Distance from origin to centre is 5, so nearest distance = 5 − 1 = 4.
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