Two cars are traveling on a desert road be- tween three consecutive poles, as shown in the figure. After 5.4 s, they are side by side at the next...

Two cars are traveling on a desert road be- tween three consecutive poles, as shown in the figure. After 5.4 s, they are side by side at the next telephone pole. The distance between the poles is 78.0 m. Find the displacement of Car A after 5.4 s. Answer in units of m.