താഴെയുള്ള വൃത്തത്തിൽ, D യിലെ  എന്ന സ്പർശരേഖയിൽ ചേരുന്നതിന് ഞാൺ   നീട്ടിയിരിക്കുന്നു. ആണെങ്കിൽ,  യുടെ നീളം കണ്ടെത്തുക.

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RRB ALP Previous Paper 5 (Held On: 10 Aug 2018 Shift 3)
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  1. 6 cm
  2. √30 cm
  3. 4 cm
  4. 5 cm

Answer (Detailed Solution Below)

Option 3 : 4 cm
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Detailed Solution

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DB × DA = DE2

⇒ DB × (5 + DB) = 62

⇒ DB × (5 + DB) = 36

∴ BD = 4 cm

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