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ഒരു വൃത്തസ്തൂപികയുടെ വക്ര ഉപരിതല വിസ്തീർണ്ണം 12320 ചതുരശ്ര സെന്റിമീറ്ററാണ്, അതിന്റെ പാദത്തിന്റെ ആരം 56 സെന്റിമീറ്ററാണെങ്കിൽ, അതിന്റെ ഉയരം കണ്ടെത്തുക.

A42 cm.

B62 cm.

C72 cm.

D52 cm.

Answer:

A. 42 cm.

Read Explanation:

വക്ര ഉപരിതല വിസ്തീർണ്ണം = 12320 cm² πrl = 12320 l = 12320/πr l = 560 / 8 = 70 സെ.മീ r² + h²= l² h² = l² - r² = 70² - 56² 4900 – 3136 = 1764 = h² h = √1764 = 42 cm


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