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അർധ ഗോളാകൃതിയിലുള്ള ഒരു പാത്രത്തിന്റെ ആരം 6 സെ.മീ. എങ്കിൽ ഈ പാത്രത്തിന്റെവ്യാപ്തം എത്ര ?

A72 π

B36 π

C144 π

D288 π

Answer:

C. 144 π

Read Explanation:

വ്യാപ്തം= (2/3)πr³ = (2/3)π × 6³ = 144π


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3 മീറ്റർ ഉയരവും 4 മീറ്റർ ആരവുമുള്ള ഒരു വൃത്തസ്തൂപികയുടെ വക്ര ഉപരിതല വിസ്തീർണ്ണം കണ്ടെത്തുക.
A park is in the shape of a rectangle. Its length and breadth are 240 m and 100 m, respectively. At the centre of the park. there is a circular lawn. The area of the park, excluding the lawn is 3904 m2. What is the perimeter (in m) of the lawn? (use π = 3.14 )