New Enroll in RBI Grade B New Batch - Starts on May 21

    Question

    The current heights of A, B, and C are in the ratio of

    10:12:15. After one year, the height of A increases by 20%, the height of B increases by 33(1/3)%, and the height of C increases by 66(2/3)%. What will be the new ratio of their heights after one year?
    A 17:15:21 Correct Answer Incorrect Answer
    B 25:18:16 Correct Answer Incorrect Answer
    C 12:15:32 Correct Answer Incorrect Answer
    D 12:16:25 Correct Answer Incorrect Answer

    Solution

    Let current heights of ‘A’, ‘B’ and ‘C’ be ‘10x’ cm, ‘12x’ cm and ‘15x’ cm, respectively After 1 year: Height of ‘A’ = (6/5) × 10x = ‘12x’ cm Height of ‘B’ = (4/3) × 12x = ‘16x’ cm And height of ‘C’ = (5/3) × 15x = ‘25x’ cm So, ratio of new heights of ‘A’, ‘B’ and ‘C’ = 12x:16x:25x = 12:16:25

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