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Discussion :: Area

  1. What is the area of rectangular field?

     I. The perimeter of the field is 110 metres.

     II. The length is 5 metres more than the width.

     III. The ratio between length and width is 6 : 5 respectively.

    2. A.

    I and II only
    B.

    Any two of the three
    C.

    All I, II and III
    D.

    I, and either II or III only
    E.

    None of these

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    Answer : Option B

    Explanation :

     I. 2(l + b) = 110          l + b = 55.

     

     II.  (b + 5)          l - b = 5.

     

    III .\(\frac { l } { b }\)=\(\frac { 6 } { 5 } \)        5l - 6b = 0.

     

    These are three equations in l and b. We may solve them pairwise.

     

     Any two of the three will give the answer.

     

     Correct answer is (B).

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