A train covers 200 Km in the first 4 Hours of its journey. It then covers 180 Km in the next 3 Hours. Finally, it covers 280 Km in the last 4 Hours of its journey. What is the average speed of the train over the whole journey?
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Average speed of the train over the whole journey is 60 km/h
Step-by-step explanation:
GIVEN
4 hours = 200 km
3 hours = 180 km
4 hours = 280 km
___________________________
TO FIND
Average speed of the train over the whole journey
___________________________
We know that,
Speed = Distance / Time
Here,
Distance = 200 km , 180 km , 280 km
Time = 4 hours , 3 hours , 4 hours
Speed = ?
___________________________
We know that,
Speed = Distance / Time
To find average speed
We need to find the total distance and total time
We know that,
Total Distance = 200 km + 180 km + 280 km
Total Time = 4 hours + 3 hours + 4 hours
Total Distance = 660 km
Time = 11 hours
We know that,
Speed = Distance / Time
Speed = 660 / 11
Speed = 60
Average Speed = 60 km/h
Average speed of the train over the whole journey is 60 km/h
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