Answer :

Given: The volume of a hemisphere is 19404 cm3.


Volume of the hemisphere is given by: × π × r3


× π × r3 = 19404


r3 = 19404 × = 9261


r3 = 9261 r = 9261


r = 21


Now, Total surface area of hemisphere is given by: 3πr2


Let S be the TSA


S = 3 × π × r2


S = 3 × π × (21)2 = 4158 cm2


S = 4158 cm2


That is TSA of the given sphere is 4158 cm2

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