1.

A spherical shell has inner radius of 13 cm and outer radius of 15 cm. If a hemisphere is made with same volume as shell, then find the radius of hemisphere.1). 12.32). 13.33). 14.34). 14.6

Answer»

Let the radius of hemisphere be R CM.

VOLUME of shell = Volume of hemisphere

⇒ π × (4/3) × cube of 15 - π × (4/3) × cube of 13 = π × (2/3) × cube of R

⇒ 2 × 1178 = cube of R

⇒ R = cube ROOT of 2356 = 13.3 cm

∴ Radius of hemisphere is 13.3 cm


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