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    Question

    The area of a trapezium is 140 cm² and the

    perpendicular distance between its parallel sides is 7 cm. If the length of one of the parallel sides is 28 cm, what is the length of the other parallel side?
    A 12 cm Correct Answer Incorrect Answer
    B 16 cm Correct Answer Incorrect Answer
    C 14 cm Correct Answer Incorrect Answer
    D 10 cm Correct Answer Incorrect Answer

    Solution

    Let the length of the other parallel side be a cm. According to the question, (a+28)/2 x 7 = 140 (a+28)/2 = 140/7 (a+28)/2 = 20 (a+28) = 40   a = 12 The length of the other parallel side is 12 cm.

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