If necessary, round your answers to 1 decimal digit.

1 a. David travels in an airplane a distance of 2880 miles. For one-fourth of the distance, the airplane flies at a speed of 760 miles per hour, and for the rest of the distance, it flies at a speed of 680 miles per hour. How long does the trip take?

 
 
 
 
 
 
 
 
 
2 a. Pete travels in an airplane a distance of 1020 km. For one-half of the distance, the airplane flies at a speed of 624 km/h, and for the rest of the distance, it flies at a speed of 624 km/h. How long does the trip take?

 
 
 
 
 
 
 
 
 
3 a. David rides his bike for 3 2/3 hours with a constant speed of 18 km/h and then for another 1 hour 55 minutes with a constant speed of 24 km/h. What is his average speed for the total trip?

 
 
 
 
 
 
 
 
 
Page 2

Answer Key

1 a. The trip takes 4 hours and 7 minutes or 4.1 hours.
2 a. The trip takes 1 hours and 38 minutes or 1.6 hours.
3 a. His average speed is 20.1 km/h.


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