Question:
A right circular cylinder of radius r and height h (h = 2r) just encloses a sphere of diameter
(a) h
(b) r
(c) 2r
(d) 2h
Solution:
Radius of cylinder = r
Height = h
= 2r
Since, the sphere fitted the cylinder.
i.e., diameter of sphere = height of cylinder.
Hence, the correct answer is choice (c).