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    Question

    The ratio of three numbers is

    7:2:5, and their squared values add up to 1248. Identify the largest number among them.
    A 42 Correct Answer Incorrect Answer
    B 32 Correct Answer Incorrect Answer
    C 28 Correct Answer Incorrect Answer
    D 18 Correct Answer Incorrect Answer

    Solution

    ATQ, Let the numbers be тАШ7pтАЩ, тАШ2pтАЩ and тАШ5pтАЩ respectively. So, 49p2 + 4p2 + 25p2 = 1248 Or, 78p2 = 1248 Or, p2 = 16 Or, p = 4 So, largest number = 7p = 7 ├Ч 4 = 28

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