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  1. Ramu rides his bike at an average speed of 45 km/hr and reaches his desitination in four hours. Somu covers the same distance in six hours. If Ramu covered his journey at an average speed which was 9 km/hr less and Somu covered his journey at an average speed which was 10 km/hr more, then the difference in their times taken to reach the destination would be (in minutes).
    2. A.
    36
    B.
    30
    C.
    40
    D.
    45
    E.
    None of these.

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    Answer : Option B

    Explanation :

    Distance travelled by Ramu = 45 * 4 = 180 km

    Somu travelled the same distance in 6 hours.

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