Multiple Choice Questions on A ladder is resting against a vertical wall and its bottom is 2 5 m away from the wall If it slips 0........... for CDS Exam Preparation

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Multiple Choice Questions

A ladder is resting against a vertical wall and its bottom is 2 5 m away from the wall If it slips 0...........

Quantitative Aptitude (CDS) Mensuration 2D
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    A ladder is resting against a vertical wall and its bottom is 2.5 m away from the wall. If it slips 0.8 m down the wall, then its bottom will move away from the wall by 1.4 m. What is the length of the ladder?

    6.2 m

    Incorrect Answer

     6.5 m

    Correct Answer

    6.8 m

    Incorrect Answer

    7.5 m

    Incorrect Answer
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    Explanation:

    AB = CD = x = Length of ladder

    Let OC = y m

    y2 + 3.92 = x2

    (y+0.8)2 + 2.52 = x2

    So y2 + 3.92 = (y+0.8)2 + 2.52

    y = 5.2m

    x= √(5.22+3.92)

    x= 6.5m

    By: Munesh Kumari
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