If necessary, round your answers to 1 decimal digit.

1 a. A police car drives 399.6 km with a constant speed of 74 km/h and another 26.5 km with a constant speed of 37 km/h. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
2 a. An airplane flies 4176 miles with a constant speed of 720 mph and another 450 miles with a constant speed of 540 mph. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. Bob roller skates 48.1 miles with a constant speed of 13 mph and another 70.3 miles with a constant speed of 15 mph. What is his average speed for the total trip?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. Its average speed is 69.7 km/h.
2 a. Its average speed is 697.4 mph.
3 a. His average speed is 14.1 mph.


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