Multiple Choice Questions on A ladder 20 m long is leaning against a vertical wall It makes an angle of 30 deg with the ground Ho........... for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

A ladder 20 m long is leaning against a vertical wall It makes an angle of 30 deg with the ground Ho...........

Quantitative Aptitude (RRB NTPC) Height and Distance
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    A ladder 20 m long is leaning against a vertical wall. It makes an angle of 30° with the ground. How high on the wall does the ladder reach? 

    10 m

    Correct Answer

    17.32 m

    Incorrect Answer

    34.64 m

    Incorrect Answer

    30 m

    Incorrect Answer
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    Explanation:
    AB = AC sin30°
    =20*1/2
    = 10 m

    By: Barka Mirza
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