Question

    A person travels from city ‘X’ to city ‘Y’ covering

    (1/4)th of the total distance in 2 hours and the remaining in 6 hours. If he returns to city ‘X’ from city ‘Y’ in 8 hours, then find his average speed for the entire journey given that the distance between city ‘X’ and city ‘Y’ is 64 km.
    A 4 km/h Correct Answer Incorrect Answer
    B 8 km/h Correct Answer Incorrect Answer
    C 5 km/h Correct Answer Incorrect Answer
    D 6 km/h Correct Answer Incorrect Answer

    Solution

    ATQ,

    Average speed = total distance covered ÷ total time taken

    Total time taken = 2 + 6 + 8 = 16 hours

    Total distance covered = 64 × 2 = 128 km.

    Required average speed = 128/16 = 8 km/h

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