1.

What will be the ratio of the surface area of a sphere and the curved surface area of the cylinder circumscribing the sphere?1). 1 ∶ 22). 1 ∶ 13). 2 ∶ 14). 2 ∶ 3

Answer»

We KNOW that,

The surface area of SPHERE = 4πr2

The curved surface area of CYLINDER = 2πrh

Diameter of sphere = HEIGHT of cylinder

⇒ 2r = h

Ratio $(= \frac{{4{\rm{\pi }}{r^2}}}{{2{\rm{\pi rh\;}}}} = \frac{{4\pi {r^2}}}{{4\pi {r^2}}} = \frac{1}{1})$



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