### Home > PC > Chapter 10 > Lesson 10.2.1 > Problem 10-73

10-73.

average speed = total distance / total time

When *t* = 0, the Icemobile is at (600, 1250).

When *t* = 30, the Icemobile is at (600, 900).

Find the total distance, or distance between the two points,and the total time.

total distance = √(600 − 600)² + (900 − 1250)² = 350 ft

total time = 30 − 0 = 30 seconds

average speed = 350/30 feet per second

Now try parts (b) and (c).

b: 20 ft/sec

c: 17.68 ft/sec