1 a. 
David's airplane trip took 4.6 hours. For onethird of that time, the airplane flew at a speed of 600 km/h, and for the rest of the time, it flew at a speed of 960 km/h. What distance did David travel?


2 a. 
Caleb's airplane trip took 4.8 hours. For onehalf of that time, the airplane flew at a speed of 780 miles per hour, and for the rest of the time, it flew at a speed of 680 miles per hour. What distance did Caleb travel?


3 a. 
Mary travels in an airplane a distance of 2280 miles. For onefourth of the distance, the airplane flies at a speed of 620 miles per hour, and for the rest of the distance, it flies at a speed of 540 miles per hour. How long does the trip take?

