A person takes a trip, driving with a constant speed of 98.5 km/h, except for a 30.0-min rest stop. The person's average speed is 67.4 km/h.

Question

(a) How much time is spent on the trip?

(b) How far does the person travel?

Answer 1

Well if t hours

Time driving = t - 0.5

Total distance = 98.5 (t-0.5)

Average speed = total distance / total time = 98.5(t-0.5) / t = 67.4

Solve this for t