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On a 100km track a train travels first 50km with a uniform speed of a 20km/hr and remaining 50km with a speed of 60km/hr . Find av

By Kennedy

On a 100km track a train travels first 50km with a uniform speed of a 20km/hr and remaining 50km with a speed of 60km/hr . Find average speed of time?

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Kennedy

17] Determine if they are in proportion 30:40 :: 45:60
1. yes
2. No​

Samuuya has chocolate as shown.He gave 1/2 part of the chocolate to his brother.what part of chocolate is left with him?Represent

2 thoughts on “On a 100km track a train travels first 50km with a uniform speed of a 20km/hr and remaining 50km with a speed of 60km/hr . Find av”

  1. Answer:

    Correct option is

    A

    90 km/h

    Total time for the journey, t=100/45=20/9 hrs

    Time for first 50 km, t

    1

    =50/30=5/3 hr

    So, time for remaining journey, t

    2

    =20/9−5/3=5/9 hrs

    Speed for remaining journey v

    2

    =

    5/9

    50

    =90 km/h

    Reply

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