If necessary, round your answers to 1 decimal digit.

1 a. An airplane flies for 0.3 hours with a constant speed of 760 mph and then for another 3 hours 8 minutes with a constant speed of 660 mph. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
2 a. Mary rides her horse for 4.4 hours with a constant speed of 20 km/h and then for another 3 hours 39 minutes with a constant speed of 8 km/h. What is her average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. An airplane flies 1176 km with a constant speed of 840 km/h and another 2773.3 km with a constant speed of 640 km/h. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. Its average speed is 668.7 mph.
2 a. Her average speed is 14.6 km/h.
3 a. Its average speed is 688.8 km/h.

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