Question

A train travels the first 5 KM's at a uniform speed of 30kmph,
The next 75 KM's at a uniform speed of 50kmph,
And at last 10 KM's at a uniform speed of 20kmph. Find the average speed of the entire journey

Answer 1

Answer:

total distance covered : 75+10+5

total time taken :5/30+75/50+10/20

:1/6+3/2+1/2

:1+9+15/6

25/6

averege speed:90/25/6

:90*6/25

:3.6*6

21.6m/s

Answer 2

Answer:

total distance covered:75+10+5 total time taken

Explanation:

5/30+75/50+10/20:1/6+3/2+1/2:1+9+15/625/6 average speed 90/25/60: 90'6/25:36.621.6m/s