If necessary, round your answers to 1 decimal digit.

1 a. Caleb rides his bike 78 km with a constant speed of 20 km/h and another 60.5 km with a constant speed of 13 km/h. What is his average speed for the total trip?

 
 
 
 
 
 
 
 
 
2 a. Noah roller skates 67.6 miles with a constant speed of 13 mph and another 29 miles with a constant speed of 12 mph. What is his average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. An airplane flies for 5.8 hours with a constant speed of 600 mph and then for another 57 minutes with a constant speed of 680 mph. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. His average speed is 16.2 km/h.
2 a. His average speed is 12.7 mph.
3 a. Its average speed is 611.3 mph.


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