If necessary, round your answers to 1 decimal digit.

1 a. An airplane flies for 2.7 hours with a constant speed of 720 km/h and then for another 4 hours 49 minutes with a constant speed of 680 km/h. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
2 a. Nancy rides her bike 45 miles with a constant speed of 18 mph and another 23 miles with a constant speed of 12 mph. What is her average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. Mike's airplane trip took 1 hour 24 minutes. For one-fourth of that time, the airplane flew at a speed of 744 km/h, and for the rest of the time, it flew at a speed of 1080 km/h. What distance did Mike travel?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. Its average speed is 694.4 km/h.
2 a. Her average speed is 15.4 mph.
3 a. Mike traveled 1394.4 km.


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