Find the volume of sphere whose surface area is 154 cm 2

1.	Find the volume of sphere whose surface area is 154 cm 2
Answer» Answer-Let r cm be the radius of sphere. Surface area of the sphere = 4πr2\xa0⇒\xa0154 = 4πr2 ⇒\xa04 x 22/7 x r2 = 154r2\xa0=\xa0154 x 7/4 x 22 = 72/22 ⇒ r = 7/2 Volume of sphere =\xa04/3πr3= 4/3 x 22/7 x 7/2 x 7/2 x 7/2 cm3= 539/3 cm3\xa0= 179.2/3 cm3

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