Answer: 5√2.
- A 5
- B 5√2
- C 10
- D 5√3
Correct answer: B. 5√2
Explanation: The chord is the hypotenuse of a right isosceles triangle with legs 5, so its length is 5√2.
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