Question

the sphere and cylinder have equal volume and equal radius the ratio of the curved surface area of the cylinder to that of the sphere is

Answer 1

Let radius of sphere = r
Radius of cylinder= r
let height of cylinder = h
given that volume of Sphere=volume of cylinder
=>4/3 πr cube = πr square h
=> 4/3 r = h
Curved surface area cylinder : sphere
= 2×π×r×4r/3 : 4πr square
=8/3: 4
=2: 3 Ans

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