Question

A bus travel a distance of 120km .WITH a speed of 40km/hr and returns with a speed of 30km/per.calculate the average speed for the entire journey

Answer 1

The total distance is 120 m
And speeds are
40m/s for first time and
30m/s for other time

Therefore, Avg.Speed= Total dist./Total time

For time of first journey
Time=Distance/speed
Time=120/40= 3 hours

For time of second journey
Time=Dist./Speed
Time=120/30 = 4 hours

Therefore avg.Speed= Total dist./Total time
Total time = 3+4=7hours
Avg.Speed= 120/7=17.1 km/hr

Therefore, Avg.Speed for the entire journey is calculated to be 17.1 km/hr...

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Answer 2

17.1 km/hr is the answer of this question