find surface area of sphere,curved surface area and total surface area of hemisphere if d=21cm
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Step-by-step explanation:
TSA of sphere = 4πr²
= 4 × 22/7 × 21/2 × 21/2
= 22 × 3 × 21
= 1386 cm²
CSA of Hemisphere = 2πr²
= 2 × 22/7 × 21/2 × 21/2
= 11 × 3 × 21
= 693 cm²
TSA of Hemisphere = 3πr²
= 3 × 22/7 × 21/2 × 21/2
= 11 × 9 × 21/2
= 1039.5 cm²
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hope it will help you..
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