1.

1). 5 : 92). 2 : 33). 10 : 214). 11 : 7

Answer»

Let the radius of the sphere and the RIGHT CIRCULAR cylinder be ‘r’ and the height of the cylinder be ‘H’.

Radius of sphere = r = Radius of right circular cylinder

CURVED surface area of sphere = Curved surface of the right circular cylinder

⇒ 4πr2 = 2πrh

⇒ h = 2r

Ratio of volumes of sphere and right circular cylinder = [(4/3) πr3] / (πr2h) = (4r/3) : 2r = 2 : 3



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