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

    Question

    A traveler covers a total distance of 600 km using a

    scooter and a train. The scooter travels at 40 km/h while the train runs at 120 km/h. If the traveler uses the scooter for 20% of the journey, find the average speed of the entire travel. (Approximate to nearest km/h)
    A 86 km/h Correct Answer Incorrect Answer
    B 71 km/h Correct Answer Incorrect Answer
    C 58 km/h Correct Answer Incorrect Answer
    D 45 km/h Correct Answer Incorrect Answer

    Solution

    ATQ,

    Time by scooter = [(0.20 × 600)/40] = (120/40) = 3 hours

    Time by train = [(0.80 × 600)/120] = (480/120) = 4 hours

    Average speed = [(Total distance)/(Total time)] = [600/(3 + 4)] = (600/7) ~ 86 km/h

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