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Mr X travels 6 km at a speed of 12 km/hr...

Mr X travels 6 km at a speed of 12 km/hr and 15 km at a speed of 19 km/hr.What is the average speed during the entire journey?

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Knowledge Check

  • A travels 15 km with a speed of 30 km/h. He another 25 km with a speed of 10 km/h. What is his average speed for the entire journey?

    A
    `(40)/(3)` km/h
    B
    `(80)/(3)` km/h
    C
    20 km/h
    D
    12 km/h

  • If you travel 39 km at a speed of 26 km/h, another 39 km at a speed of 39 km/h and again 39 km at a speed of 52 km/h, what is your average speed for the entire journey?

    A
    39 km/h
    B
    37 km/h
    C
    33.33 km/h
    D
    36 km/h

  • A train covers the first 5 km of its journey at a speed of 30 km/hr and the next 15 km at a speed of 45 km/hr. What is the average speed of the train?

    A
    35km/hr
    B
    37.5km/hr
    C
    39.5km/hr
    D
    40km/hr

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