If necessary, round your answers to 1 decimal digit.

1 a. Grace travels in an airplane a distance of 1320 km. For one-third of the distance, the airplane flies at a speed of 960 km/h, and for the rest of the distance, it flies at a speed of 1000 km/h. How long does the trip take?

 
 
 
 
 
 
 
 
 
2 a. An airplane flies for 3 7/12 hours with a constant speed of 744 km/h and then for another 2 hours 40 minutes with a constant speed of 1008 km/h. What is its average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. Julia's airplane trip took 5.2 hours. For one-half of that time, the airplane flew at a speed of 640 miles per hour, and for the rest of the time, it flew at a speed of 640 miles per hour. What distance did Julia travel?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. The trip takes 1 hours and 20 minutes or 1.3 hours.
2 a. Its average speed is 856.6 km/h.
3 a. Julia traveled 3328 miles.


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