If the total surface area of a hemisphere is 192 then find its curved surface area.
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128 square unit
The total surface area of hemisphere=3πr^2
192=3πr^2
192÷3=πr^2
64=πr^2 -------> now we put it in to curve surface area formula
The curved surface area of hemisphere =2πr^2
=2×64=128 (:πr^2=64)
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