Question

    The ratio of the sides of a quadrangle plane is 2: 3: 4:

    5, and the perimeter is 840 cm. Find the length of the smallest arm (in cm).
    A 120 Correct Answer Incorrect Answer
    B 140 Correct Answer Incorrect Answer
    C 110 Correct Answer Incorrect Answer
    D 130 Correct Answer Incorrect Answer

    Solution

    Let the side of the Quadrangle be 2x,3x,4x, and 5x. ATQ- Perimeter =2x+3x+4x+5x 2x+3x+4x+5x =840 14x =840 x=60. Length of the smallest arm =2x =2×60 =120cm.

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