Qid : 23 - the total surface area of a hemisphere is 1039.5 cm2. Find its diameter (in cm).
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Answer:
Step-by-step explanation:
Given:
Total surface Area of hemisphere= 166.32 cm²
Total surface Area of hemisphere= 3πr²
166.32 = 3 × (22/7) × r²
166.32× 7 = 66× r²
1164.24 = 66 r²
r² = 1164.24/66
r²= 17.64
r= √ 17.64 =√(1764/100) =42/10= 4.2 cm
Hence, the radius of the hemisphere is = 4.2 cm
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