Find the total surface area of a closed hemisphere whose radius is 3.5 cm. (Use π=22/7)
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Correct answer: C
Explanation
The correct answer is option 3 i.e. 115.5 cm2
According to the question,
TSA = 3π(3.5)2
⇒ TSA = 3 × 22/7 × 12.25
⇒ TSA = 808.5/7 = 115.5 cm2