Question

A group of bike riders took a 4 hour trip. During the first 3 hours, they traveled a total of 50 km, but
during the last hour they traveled only 10 km. What was the group's average speed for the entire trip?
A. 60 km/hr
C 30 km hr
B. 40 km hr
D. 15 km hr

Answer 1

Answer:

15km/hr

Explanation:

The average speed for the entire trip is the sum of the total distance traveled divided by the total time of the trip.

Total time  = 4hr

distance for the first 3hrs  = 50km

distance for the last 1hr  = 10km

  Total distance  = 50km + 10km  = 60km

Now;

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

 Insert the parameters and solve;

 Average speed  = $\frac{60km}{4hr}$   = 15km/hr