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    Question

    When the side of a square is increased by 50%, then what

    will be the %  change in the area of the square?
    A 110 Correct Answer Incorrect Answer
    B 130 Correct Answer Incorrect Answer
    C 125 Correct Answer Incorrect Answer
    D 120 Correct Answer Incorrect Answer
    E none of these Correct Answer Incorrect Answer

    Solution

    Let the side of a square be=10s  Then old side of the square is =10s x 10s = 100s2 Then, New side of the square will be = 15s x 15s = 225s2  Therefore, required % change will be = 125 x (100/100) = 125

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