Respuesta :
Answer: 60.6 miles per hour
Step-by-step explanation: 5 hours + 3 hours + 30 mins = 8 hours 30 mins 485 divided by 8
The total distance from the family’s home to Helena is 485 miles.
including the 30-minute lunch stop. The average speed over the entire trip is 60.6 miles per hour.
How is average speed calculated?
The average speed is the ratio of total length traveled to the total time taken to travel that length.
Thus, if
[tex]d_2 = \text{final position}\\d_1 = \text{initial position}\\t_2 = \text{end time}\\t_1 = \text{start time (of travelling)}[/tex]
then,
[tex]S_a = \dfrac{d_2 - d_1}{t_2 - t_1}[/tex]
where S is the average speed of the traveler.
At 1 P. M. the family resumes their trip, and they reach Helena at 5 P. M.
The total distance from the family’s home to Helena is 485 miles.
Including the 30-minute lunch stop.
The total time taken
5 hours + 3 hours + 30 mins = 8 hours 30 mins
The average speed over the entire trip
[tex]S_a = \dfrac{d_2 - d_1}{t_2 - t_1}[/tex]
= 485/ 8
= 60.6 miles per hour
Learn more about average speed here:
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