In a journey of 1000 km a train covers the first 600 km /h and the remaining distance at 40km/h .calculate the average speed of the train during the whole journey.
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"the first 600 km /h"?
50km/h
To calculate the average speed of the train during the whole journey, you need to find the total time taken and the total distance covered.
Let's start by calculating the time taken to cover the first 600 km at a speed of 600 km/h. We can use the formula: Time = Distance / Speed.
Time taken = 600 km / 600 km/h = 1 hour.
Now, let's calculate the time taken to cover the remaining distance of 400 km at a speed of 40 km/h.
Time taken = 400 km / 40 km/h = 10 hours.
Therefore, the total time taken to complete the whole journey is 1 hour + 10 hours = 11 hours.
Now, let's calculate the total distance covered during the entire journey, which is 1000 km.
Now, we can calculate the average speed using the formula: Average Speed = Total Distance / Total Time.
Average Speed = 1000 km / 11 hours.
Therefore, the average speed of the train during the whole journey is approximately 90.91 km/h.