Multiple Choice Questions on A 20m long stair is standing against a wall making an angle of 60 Acirc from the ground Find the di........... for RRB(NTPC) Exam Preparation

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Multiple Choice Questions

A 20m long stair is standing against a wall making an angle of 60 Acirc from the ground Find the di...........

Quantitative Aptitude (RRB NTPC) Height and Distance
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    .A 20m long stair is standing against a wall making an angle of 60Â from the ground. Find the distance between the foot of the stair and wall.

    10m

    Correct Answer

    17.32m

    Incorrect Answer

    34.64m

    Incorrect Answer

    30m

    Incorrect Answer
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    Explanation:
    Let the distance between foot of stair
    and wall is x
    Cos 60o = x/20
    ½ = x/ 20
    x = 10 m

    By: Barka Mirza
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