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

15km/hr

Step-by-step 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 =
`(total distance )/(time taken)`

Insert the parameters and solve;

Average speed =
`(60km)/(4hr)` = 15km/hr