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    Question

    The perimeter of a rectangular field is 44 metres and

    its area is 114 m2 . What is the length of the diagonal of this field?
    A 12 metres Correct Answer Incorrect Answer
    B 13 metres Correct Answer Incorrect Answer
    C 16 metres Correct Answer Incorrect Answer
    D 17 metres Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Let the length and breadth of the rectangular field be тАШpтАЩ metres and тАШqтАЩ metres respectively Then, according to the question, 2 ├Ч (p + q) = 44 Or, (p + q) = 44/2 = 22тАжтАж (1) Also p ├Ч q = 114 We know, (p + q)2 = p2 + q2 + 2pq Or, p2 + q2 = 222 тАУ 2 ├Ч 114 Or, p2 + q2 = 256 So, length of the diagonal of the rectangular field = тИЪ(length2 + breadth2) = тИЪ(p2 + q2) = тИЪ256 = 16 metres

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