If necessary, round your answers to 1 decimal digit.

1 a. Bob's airplane trip took 3 hours 48 minutes. For one-third of that time, the airplane flew at a speed of 1080 km/h, and for the rest of the time, it flew at a speed of 648 km/h. What distance did Bob travel?

 
 
 
 
 
 
 
 
 
2 a. Bob roller skates 23.5 miles with a constant speed of 6 mph and another 3 miles with a constant speed of 12 mph. What is his average speed for the total trip?

 
 
 
 
 
 
 
 
 
3 a. Emily travels in an airplane a distance of 3600 miles. For one-half of the distance, the airplane flies at a speed of 648 miles per hour, and for the rest of the distance, it flies at a speed of 552 miles per hour. How long does the trip take?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. Bob traveled 3009.6 km.
2 a. His average speed is 6.4 mph.
3 a. The trip takes 6 hours and 2 minutes or 6 hours.


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