If necessary, round your answers to 1 decimal digit.

1 a. Noah roller skates 13.2 miles with a constant speed of 6 mph and another 74 miles with a constant speed of 15 mph. What is his average speed for the total trip?

 
 
 
 
 
 
 
 
 
2 a. John rides his bike 11.4 km with a constant speed of 19 km/h and another 10.9 km with a constant speed of 8 km/h. What is his average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. An airplane flies for 2 3/4 hours with a constant speed of 864 km/h and then for another 40 minutes with a constant speed of 1080 km/h. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. His average speed is 12.2 mph.
2 a. His average speed is 11.3 km/h.
3 a. Its average speed is 906.1 km/h.

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