10th Class Mathematics Triangles Question Bank Case Based (MCQs) - Triangles

  • question_answer
    The distance of fly at the end of the string from the point over the water surface just below the tip of fishing rod, after 12 seconds is:

    A) \[\text{1}.\text{2 m}\]

    B) \[\text{2}.\text{52 m}\]

    C) \[\text{1}.\text{59 m}\]

    D) \[\text{2}.\text{79 m}\]

    Correct Answer: C

    Solution :

    \[B{{D}^{2}}=A{{D}^{2}}-A{{B}^{2}}\] (By Pythagoras theorem)       
     \[\Rightarrow \,\,\,\,BD=\sqrt{2.52}=1.59m\] (Approx.)    
    So, option [c] is correct.

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