The bus driver's manager wants to know the average speed at which the driver was actually driving the bus that day while he was on the road. DON'T include the rest stops.
A bus driver runs a round trip route between 3 cities. It takes 5 hrs for the 400 km trip to the first city. Reloading the bus takes 30 minutes. On the road again, it takes 3 hrs 15 min to get to the second city, which is 220 km away. After a 1 1/4 hr supper, he drives back to his home city which is 280 km away in 4 hrs. What average speed did he have for the day's drive?
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To find the average speed for the day's drive, we need to calculate the total distance traveled by the bus and the total time taken, excluding rest stops.
First, let's find the total distance traveled:
Distance from home city to the first city: 400 km
Distance from the first city to the second city: 220 km
Distance from the second city back to the home city: 280 km
Total distance traveled by the bus: 400 km + 220 km + 280 km = 900 km
Next, let's calculate the total time taken:
Time taken from home city to the first city: 5 hours
Reloading the bus: 30 minutes = 0.5 hours
Time taken from the first city to the second city: 3 hours 15 minutes = 3.25 hours
Supper break: 1 hour 15 minutes = 1.25 hours
Time taken from the second city back to the home city: 4 hours
Total time taken by the bus: 5 hours + 0.5 hours + 3.25 hours + 1.25 hours + 4 hours = 14 hours
Now, we can calculate the average speed:
Average speed = Total distance / Total time
Average speed = 900 km / 14 hours
Calculating this, the average speed of the bus for the day's drive is approximately 64.29 km/h.
To calculate the average speed of the bus driver for the day's drive, we need to determine the total distance covered and the total time taken on the road.
Let's break down the journey and calculate accordingly:
1. From the home city to the first city:
- Distance: 400 km
- Time taken: 5 hours
2. Loading time at the first city:
- Time taken: 30 minutes (or 0.5 hours)
3. From the first city to the second city:
- Distance: 220 km
- Time taken: 3 hours 15 minutes (or 3.25 hours)
4. Supper break at the second city:
- Time taken: 1 hour 15 minutes (or 1.25 hours)
5. From the second city back to the home city:
- Distance: 280 km
- Time taken: 4 hours
Now, let's calculate the total distance and total time:
Total distance = Distance to first city + Distance to second city + Distance back home
= 400 km + 220 km + 280 km
= 900 km
Total time = Time to first city + Loading time + Time to second city + Supper break + Time back home
= 5 hours + 0.5 hours + 3.25 hours + 1.25 hours + 4 hours
= 14 hours
Finally, we can calculate the average speed:
Average speed = Total distance / Total time
= 900 km / 14 hours
= 64.29 km/h
Therefore, the average speed at which the bus driver was driving the bus that day, excluding rest stops, is approximately 64.29 km/h.