if two hemisphere of curved surface area 8π cm² each are joined together to form a shpere .what is the total surface area of the sphere ?
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CSA of a sphere= 2πr²
8π=2πr²
4=r²
r=√4=2cm
TSA of sphere = 4πr²
=4x22/7x4
=352/7
=50.28cm²
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