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3 മീറ്റർ ഉയരവും 4 മീറ്റർ ആരവുമുള്ള ഒരു വൃത്തസ്തൂപികയുടെ വക്ര ഉപരിതല വിസ്തീർണ്ണം കണ്ടെത്തുക.

A63

B33

C45

D79

Answer:

A. 63

Read Explanation:

വൃത്തസ്തൂപികയുടെ വക്ര ഉപരിതല വിസ്തീർണ്ണം = π × r × l l =√h² + r² = √(3² + 4²) = 5 വൃത്തസ്തൂപികയുടെ വക്ര ഉപരിതല വിസ്തീർണ്ണം = (22 × 4 × 5)/7 = 62.85 ≈ 63 π = 22/7


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