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    Question

    Initially the diameter of a balloon is 28 cm. It can

    explode when the diameter becomes 5/2 times of the initial diameter. Air is blown at 156 cc/s. It is known that the shape of balloon always remains spherical. In how many seconds the balloon will explode?
    A 1078 s Correct Answer Incorrect Answer
    B 1368 s Correct Answer Incorrect Answer
    C 1087 s Correct Answer Incorrect Answer
    D none of these Correct Answer Incorrect Answer

    Solution

    The correct answer is A

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