Question

if the csa of sphere is 900π cm² find the radius​

Answer 1

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Answer 2

Given :-

✦Csa of sphere is 900π cm²

Have to Find :-

Radius of the Sphere.

$\Large{\underline{\underline{\bf{Solutions:-}}}}$

➹Curved Surface Area of Sphere = 4πr²

➹900π = 4πr²

Substracting π from both sides we get :

➹ r² = 900 ÷ 4

➹ r² = 225

➹ r = √225

➹ r = 15 cm

$:\implies \underline{ \boxed{ \sf r = 15\: cm }}\: \: \: \: \Bigg\lgroup\textsf{\textbf{Radius of the Sphere}}\Bigg\rgroup$

Formulas required :-

Volume of cube = a³

Volume of sphere = 4/3πr³

Surface area of sphere = 4πr²