If necessary, round your answers to 1 decimal digit.

1 a. A train travels for 1 hour with a constant speed of 20 mph and then for another 4 hours 23 minutes with a constant speed of 73 mph. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
2 a. An airplane flies for 3 3/4 hours with a constant speed of 1056 km/h and then for another 55 minutes with a constant speed of 936 km/h. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. Nancy drives her car for 1 5/6 hours with a constant speed of 60 mph and then for another 1 hour 45 minutes with a constant speed of 24 mph. What is her average speed for the total trip?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. Its average speed is 63.2 mph.
2 a. Its average speed is 1032.4 km/h.
3 a. Her average speed is 42.4 mph.


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