If the ratio of the radii of two hemispheres is 3 : 4, then what is the ratio of their curved surface areas?

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രണ്ട് അർദ്ധ ഗോളങ്ങളുടെ ആരങ്ങൾ തമ്മിലുള്ള അനുപാതം 3 : 4 ആണെങ്കിൽ അവയുടെ വക്രതല വിസ്തീർണങ്ങൾ തമ്മിലുള്ള അനുപാതം എത്ര ?

A16:9

B9:16

C9:18

D16:32

Answer:

B. 9:16

Read Explanation:

r ₁ : r ₂ = 3 : 4 3 ∏ r₁ ² : 3∏ r₂ ² r₁² : r₂² = 3² : 4² = 9 : 16

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