Question

Cylinder whose height is height is 2/3
of its diameter has the same volume as that of a spear of radius 4 cm find the radius of the base of the cylinder

Answer 1

h = 2d/3

h = 4R/3

VOL. OF CYLINDER = VOL. OF SPHERE

πR²h = 4/3 * π r³

R²h = 4/3 r³

R²* 4R/3 = 4/3 r³

R³ = r³

R = r = 4cm