Multiple choice

A right circular cylinder of radius r cm and height h cm (h>2r) just encloses a sphere of diameter

  1. r cm

  2. 2r cm

  3. h cm

  4. 2h cm
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

If a cylinder just encloses a sphere, the sphere's diameter must equal the cylinder's diameter (2r) and the cylinder's height (h). Since the sphere is inside, its diameter is 2r.

AI explanation

When a right circular cylinder just encloses a sphere, the diameter of the sphere exactly matches the diameter of the cylinder's base. Since the base radius of the cylinder is r cm, its diameter is 2r cm. Therefore, the diameter of the enclosed sphere is 2r cm.

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