Question

    The average height of three boys is 170 cm. If their

    heights are in the ratio 6:4:7, what is the height of the tallest boy?
    A 160 cm Correct Answer Incorrect Answer
    B 180 cm Correct Answer Incorrect Answer
    C 200 cm Correct Answer Incorrect Answer
    D 210 cm Correct Answer Incorrect Answer

    Solution

    Sum of height of boys = 3 × 170 = 510 cm
    Let the height of three boys be ‘6x’ cm, ‘4x’ cm and ‘7x’ cm.
    So, 6x + 4x + 7x = 510
    So, x = 30
    Height of tallest boy = 7x = 7 × 30 = 210 cm.

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