Question

    One of the angles of a quadrilateral is 80º. If ratio of

    remaining angles of quadrilateral is 6:3:5 respectively, then find the smallest angle of quadrilateral.
    A 80º Correct Answer Incorrect Answer
    B 60º Correct Answer Incorrect Answer
    C 30º Correct Answer Incorrect Answer
    D 40º Correct Answer Incorrect Answer

    Solution

    Let the remaining angles of quadrilateral be '6a', '3a' and '5a' respectively.
    So, 6a + 3a + 5a + 80 = 360
    Or, 14a = 280
    Or, 'a' = 20
    Therefore, smallest angle = 3 X 20 = 60º

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