Question

If the T.S.A of solid hemisphere is 462 cm square . FIND ITS VOLUME ?

Answer 1

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we know that the volume and total surface area of hemisphere.

=> V = 2/3πr³

=> T.S.A = 2πr²

=> ( π = 22/7) : GIVEN

=> here is given that the surface areas of hemisphere is 462 cm²

=> 462 = 2 × 22/7 × r²

=> 462 = 44/7 × r²

=> r² = 462 × 7/44

=> r² = 73.5

=> r = √ 73.5

=> r = 8.6 ( @ppox )

now, the volume of hemisphere

=> 2/3πr³

=> 2/3 × 22/7 × (8.6)³

=> 1332.7 cm³

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