A) $ 2\pi R^{3} $
B) $ 4\pi R^{3} $
C) $ 8\pi R^{3} $
D) $ \frac{8}{3}\pi R^{2} $
Correct Answer: A
$ \therefore $ Radius of cylinder = Radius of sphere = R and height of cylinder $ =2\times $ radius of sphere = 2 R
$ \therefore $ Volume of cylinders $ =\pi r^{2}h $ [ $ \because $ r = radius, h = height] $ =\pi R^{2}\times 2R=2\pi R^{3} $