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  1. Walking 7/6 of his usual rate, a boy reaches his school 4 min early. Find his usual time to reach the school?
    2. A.
    25 min
    B.
    26 min
    C.
    27 min
    D.
    28 min

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    Answer : Option D

    Explanation :

    Speed Ratio = 1:7/6 = 6:7

    Time Ratio = 7:6

    1 -------- 7

             4 --------- ? ¨ 28 m

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