രണ്ട് വൃത്തങ്ങളുടെ ആരം 20 സെന്റീമീറ്ററും 18 സെന്റീമീറ്ററുമാണ്. രണ്ട് വൃത്തങ്ങളും രണ്ട് പോയിന്റുകളിൽ പരസ്പരം ഛേദിക്കുന്നു. അവയുടെ പൊതുവായ ഞാണിന്റെ നീളം 16 സെ.മീ. ആണ്. അപ്പോൾ, അവയുടെ കേന്ദ്രങ്ങൾ (സെന്റിമീറ്ററിൽ) തമ്മിലുള്ള ദൂരം എന്താണ്?

  1. \(\left( {4\sqrt {21} + 2\sqrt {65} } \right)\)
  2. \(\left( {4\sqrt {21} + 3\sqrt {65} } \right)\)
  3. \(\left( {3\sqrt {21} + 2\sqrt {65} } \right)\)
  4. \(\left( {2\sqrt {21} + 4\sqrt {65} } \right)\)

Answer (Detailed Solution Below)

Option 1 : \(\left( {4\sqrt {21} + 2\sqrt {65} } \right)\)
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Detailed Solution

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F1 M.S 15.5.20 Pallavi D31

നൽകിയിരിക്കുന്നത്, CD = 16 cm 

∴ CE = 16/2 = 8 cm

ഇപ്പോൾ, ΔACE- ൽ

AE= AC2 - EC2

⇒ AE2 = (20)- 82

⇒ AE2 = 400 - 64

⇒ AE2 = 336

⇒ AE = √336

⇒ AE = 4√21 cm

ΔCEB- യിൽ,

EB2 = CB2 - CE2

⇒ EB2 = 182 - 82

⇒ EB2 = 324 - 64

⇒ EB2 = 260 cm

⇒ EB = 2√65 cm

∴ കേന്ദ്രങ്ങൾ തമ്മിലുള്ള ദൂരം (AB) = AE + EB = (4√21 + 2√65) cm 

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