A train moving on linear path travels a distance d at a constant speed of 30km/h, than it travels the same distance in opposite direction and reaches inital position at a constant speed of 45km/h. What is the average speed of the train
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Answer:
36 m/s
Explanation:
a train moves distance d at a speed of 30m/s.
it travels same distance at speed of 45m/s.
therefore, if the distance travelled will be same and speed will be different then,
average velocity will be 2v1v2/v1+v2
thus, average velocity = 2×30×45/30+45
=2×30×45/75
=60×45/75
=36 m/s
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