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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
- Engr. RonaldLv 71 week agoFavourite 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//
- ?Lv 71 week 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_youngLv 71 week 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
