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      Question

      The angle of elevation of a ladder leaning against a

      wall is 45 and the foot of the ladder is 10 m away from the wall. The length of the ladder
      A 10 m Correct Answer Incorrect Answer
      B 13 m Correct Answer Incorrect Answer
      C 15 m Correct Answer Incorrect Answer
      D 16 m Correct Answer Incorrect Answer

      Solution

      Let the length of the ladder =AC Cos 45° =AC/10 1/ √2 = AC/10 AC =1.414×10=14.14 meter.

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