Question

a train 350 M long cross and electric pole in 28 seconds find the speed of train in kilometre per hour

Answer 1

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Speed =distance /time
Speed =350/28
=12.5 m/sec
Now in km/ hr =12.5*3600/1000*10
45 km per hour
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Answer 2

Answer:

The speed of the train is 45 km per hour

To find:

Speed of train = ?

Solution:

Given : A train 350 m long crosses an electric pole in 28 seconds  

Speed = distance / time

=350/28

Speed = 12.5 m/s        

Convert metre per second into kilometre per hour,

1 m/s = 18/5 km per hour

12.5 m/s = 12.5 × 18/5 km per hour

= 45 km per hour  

Thus the speed of the train is 45 km per hour