Question

21 सेमी त्रिज्या वाले एक अर्धगोले का कुल पृष्ठीय क्षेत्रफल ज्ञात कीजिए? Find the total surface area of a hemisphere of radius 21 cm?​

Answer 1

Answer:

4,158 cm^2

Step-by-step explanation:

TSA of Hemisphere = 3πr^2

= 3 × 22/7 × 21 × 21

= 3 × 22 × 21 × 3

= 462 × 9

= 4158

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