1.

Find the diameter of a sphere whose surface area is 100π cm21). 5 cm2). 7 cm3). 12 cm4). 8 cm

Answer»

Let, the radius of the sphere = r cm.

∴ Surface AREA of the sphere = 4πr2 cm2

According to Problem,

⇒ 4πr2 = 100π

Or, r2 = 25

⇒ r = 5

DIAMETER of the sphere = 2R = 2 × 5 = 10CM



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