For radius 21 cm: (i) Curved surface area is 2πr² = 2 × (22/7) × 21² = 2772 cm². (ii) Total surface area is 3πr² = 3 × (22/7) × 21² = 4158 cm². Class 9 Ganita Manjari part 2 Chapter ...
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For radius 21 cm: (i) Curved surface area is 2πr² = 2 × (22/7) × 21² = 2772 cm². (ii) Total surface area is 3πr² = 3 × (22/7) × 21² = 4158 cm². Class 9 Ganita Manjari part 2 Chapter ...