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    Question

    If a train runs at a uniform speed that is equal to

    three-fourth of its usual speed, then it reaches its destination 1 hour 45 minutes late. How much time will the train take to reach its destination if it runs at its usual speed?
    A 5 h 10 min Correct Answer Incorrect Answer
    B 5 h 20 min Correct Answer Incorrect Answer
    C 5 h 15 min Correct Answer Incorrect Answer
    D 5 h Correct Answer Incorrect Answer

    Solution

    The ratio of Initial speed to Final speed = 4 ∶ 3 ⇒ the Ratio of Initial Time to Final Time  = 3 ∶ 4 ⇒ The difference in time = 1 ⇒ 1 = 7/4 ⇒ Actual time taken = 3 × 7/4 = 21/4 = 5hrs 15 min

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