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Apurba
Apurba asked in Science & MathematicsMathematics · 2 weeks ago

Could you please help me with this mathematical problem?

a man in a train notices that he can count 31 poles in one minute. if they are known to be 50 metres apart, then at what speed is the train traveling?​

4 Answers

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  • Engr. Ronald
    Lv 7
    2 weeks ago
    Favorite Answer

    given

    t = 1 min x 1hour/60min = 0.0166 hours

    d = 50 m  x 31 = 1550 m x km/1000m = 1.55km

    solving the trains speed

    s = d/t

    s = 1.55 km/ 0.0166 hours

    s = 93.37 km/h or 93 km/h    Answer//

  • Philomel
    Lv 7
    2 weeks ago

    31 poles = 30 spaces.

    30*50=1500 m/min

  • Krishnamurthy
    Lv 7
    2 weeks ago

    A man in a train notices that he can count 

    31 poles in one minute. 

    If they are known to be 50 meters apart, 

    then the train is traveling at 90 km per hour.

  • roderick_young
    Lv 7
    2 weeks ago

    50 metres / pole * 31 poles / minute = 1550 metres / minute

    For more conventional units:

    1550 metres / minute  * (1/1000) metre / km = 1,55 km / minute

    1,55 km / minute * 60 minutes / hr = 93 km/hr

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