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

    Question

    A man is travelling at a speed of 30 km/h such that he

    will take 70 minutes to reach his destination. But after completing half the journey, the man took a break of 25 minutes and then continued his journey. Find the speed at which the man must cover rest of the journey to reach his destination in original time.
    A 100 km/h Correct Answer Incorrect Answer
    B 105 km/h Correct Answer Incorrect Answer
    C 95 km/h Correct Answer Incorrect Answer
    D 107 km/h Correct Answer Incorrect Answer
    E 110 km/h Correct Answer Incorrect Answer

    Solution

    Total distance to be covered = 30 × (70/60) = 35 km Time taken to cover half the distance at original speed = {(35 ÷ 2) ÷ 30} × 60 = 35 minutes Time remaining = 70 – 35 – 25 = 10 minutes Required speed = 17.5 ÷ 10 × 60 = 105 km/h

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