The distance between two station is 500 kmA train goes from one station to the other with the speed of 50 km/hr and return from a speed of 25 km/hr what is is the avrage speed of the train during the journey?
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Answer:
First off, you can find average speed by calculating the total distance by time taken.
Now, time is not given in the question. So. we can find it by dividing distance/speed.
CASE 1
d = 500km
speed = 50 km/hr
time = d/speed = 500/50 = 10 hrs.
CASE 2
d = 500 km
speed = 25 km/hr
time = d/speed = 500/25 = 20 hrs.
Now, Average speed as I mentioned before is the total distance by total time.
so, avg. speed = 500+500/20+10
= 1000/30
=333.33 km/hr
It's pretty simple! Hope you have understood!
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