Question

. Total surface area of a sphere is 100 cm. It is cut in two hemispheres, the area of plane face of one hemisphere is


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Answer 1

Answer:

25cm

Step-by-step explanation:

TSA of sphere = 4πr² = 100cm²

r² = 100/4π

r² = 25/π

cut into two hemispheres

tsa of one hemisphere = 3πr² = 3π × 25/π = 75cm

therefore, area of plane face of one hemisphere = πr²

πr² = π × 25/π = 25cm