Ratio of the volumes of a sphere of radius 'r' and a cylinder of radius 'r' and height '2r' is:

Correct option is B

Given:
Radius of sphere = r
Radius of cylinder = r
Height of cylinder = 2r
Formula Used:
Volumes of the sphere = $$\frac43 \pi \times r^3$$​​
Volumes of cylinder = $$\pi\times r^2\times h$$​​
Solution:

$$\frac{4}{3} \times \pi r^3 : \pi r^2 \times 2r \\2 : 3$$​