The base of a right circular cylinder has the same radius 'a' as that of a sphere. Both have the same volume, then the height of the cylinder is -

\(\frac{4}{3}\)a

                          Cylinder          Sphere

Ratio of radius           1        :         1     = (a)

Ratio of volume          1       :         1

 ⇒ \(\pi \) a²h : \(\frac{4}{3}\) \(\pi \) a³ =    1    :    1

 ⇒ h = \(\frac{4}{3}\)a