Question 949586
The buses are separating at the rate of 504km/2hrs=252 km/hr so the combined rates are 252 km/hr. One bus travels at rate=r, the other rate=r+14 km/hr:
r+(r+14 km/hr)=252 km/hr  Subtract 14 km/hr from each side.
2r=238 km/hr Divide each side by 2.
r=119 km/hr ANSWER 1: The slower bus is traveling at 119 km/hr
r+14 km/hr=119 km/hr+14 km.hr=133 km/hr ANSWER 2:  The faster bus is traveling 133 km/hr.