10. In reaching her destination, a backpacker walks with an average velocity of 1.34 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.68 m/s, due west, turns around, and hikes with an average velocity of 0.447 m/s, due east. How far east did she walk?
(Cutnell, John D.. Physics, 8th Edition. John Wiley & Sons, 012009. p. 53).
The Attempt at a Solution
2.68 m/s2 = 6.44 km/tw
.447 m/s2 = De/te
Avg V = (X - X0)/(t - t0)
The answer is 0.81 km, but I can't figure out how to solve this.