SOLUTION: Juan roller skates for 10 minutes with a constant speed of 13 km/h and then for another 1 hour with a constant speed of 17 km/h. What is his average speed for the total trip?

Question 1101416: Juan roller skates for 10 minutes with a
constant speed of 13 km/h and then for
another 1 hour with a constant speed of
17 km/h. What is his average speed for
the total trip?
How do I start thi problem please
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
Juan roller skates for 10 minutes with a constant speed of 13 km/h and then for
another 1 hour with a constant speed of 17 km/h.
What is his average speed for the total trip?
:
We want both the times in hrs; = or .167 hrs
:
Find the total distance traveled dist = speed * time
13 * = = 2.167km
17 * 1 = 17 km
total distance 19.167 km
:
Average speed = total dist/total time
total time = 1.167 hrs
= 16.4 km/hr is the average speed
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