A man cycles at 20k km/hr over a xertain distance and then returns over the same distance at a speed of 15 km/hr. What is tge average speed for the whole journey? Please solve it friends......
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Let the distance be x
So, total distance = 2x
Now, time taken to go to destination = x/20
Time taken t return from destination = x/15
So, total time taken = x/20 +x/15
= 35x/300
Now, average speed = total distance /total time taken
= 2x/35x/300
= 600/35
= 17. 14 km/h
So, total distance = 2x
Now, time taken to go to destination = x/20
Time taken t return from destination = x/15
So, total time taken = x/20 +x/15
= 35x/300
Now, average speed = total distance /total time taken
= 2x/35x/300
= 600/35
= 17. 14 km/h
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