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    Question

    The three sides of a triangle are 10,100 and x . Which

    one of the following is correct ?
    A 10 < x < 100 Correct Answer Incorrect Answer
    B 90 < x < 110 Correct Answer Incorrect Answer
    C 90 < x < 100 Correct Answer Incorrect Answer
    D 90 < x < 110. Correct Answer Incorrect Answer

    Solution

    ATQ,

    To form a triangle, the sides must satisfy: 10 + 100 > x → x < 110 10 + x > 100 → x > 90 So, the valid range is: 90 < x < 110

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