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A train moves at a speed of 35 km/h for the first 2 hours and at a speed of 50 km/h for the next 4 hours. Find the average
speed of the train during the entire journey.
47 km/h
50 km/h
45 km/h
35 km/h
- To find the average speed, calculate the total distance and total time.
- First stage: 35 km/h for 2 hours = 70 km.
- Second stage: 50 km/h for 4 hours = 200 km.
- Total distance: 70 km + 200 km = 270 km.
- Total time: 2 hours + 4 hours = 6 hours.
- Average speed = Total distance / Total time = 270 km / 6 hours = 45 km/h.
- Option 1: 47 km/h - Incorrect, higher than calculated.
- Option 2: 50 km/h - Incorrect, represents only the second stage speed.
- Option 3: 45 km/h - Correct, matches calculated average speed.
- Option 4: 35 km/h - Incorrect, represents only the first stage speed.
.
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