व्हाट इज द टोटल सरफेस एरिया ऑफ हेमिस्फीयर आफ रेडियस आर एंड पाई आर स्क्वायर
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The area of a circle of radius r is πr2 and thus if the hemisphere is meant to include the base then the surface area is 2πr2+πr2=3πr2.
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