Question

A group of bike riders took a 4.0 hour trip. during the first 3.0 hours, they traveled a total of 50. kilometers, but during the last hour, they traveled only 10. kilometers. what was the group's average speed for the entire trip?

Answer 1

Answer:

15 km/h

Step-by-step explanation:

Distance traveled in first 3 hours = 50 km

Distance traveled in last one hour = 10 km

Total time taken, t = 3 hours + 1 hour = 4 hours

Total distance traveled = 50 km + 10 km = 60 km

The average speed is defined as the ratio of total distance traveled to the total time taken.

$Average speed = \frac{total distance traveled }{total time taken}$

$Average speed = \frac{60}{4}$

Average speed = 15 km/h

Thus, the average speed of the bike riders for the entire trip is 15 km/h.

Answer 2

The average speed for the entire journey will be given by:
average speed=(total distance)/(total time)
total distance=50+10=60 km
total time=4 hours
thus
average speed=60/4=15 km/hr