താഴെയുള്ള വൃത്തത്തിൽ, D യിലെ \(\overline {DE}\) എന്ന സ്പർശരേഖയിൽ ചേരുന്നതിന് ഞാൺ \(\overline {AB} \)  നീട്ടിയിരിക്കുന്നു. \(\overline {AB} \; = \;5\;cm\)\(\overline {DE} \; = \;6\;cm,\)ആണെങ്കിൽ, \(\overline {BD} \) യുടെ നീളം കണ്ടെത്തുക.

10-Aug 3rd Shift Shraddha 20 - translated Reviewedc images Q2

This question was previously asked in
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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