9514 1404 393
Answer:
 85 km/h
Step-by-step explanation:
Let s represent the speed of the slower car. Then the travel time is ...
 time = distance/speed
 2 = 360/(s +(s+10))
 4s +20 = 360 . . . . . multiply by 2s+10
 4s = 340 . . . . . . . . . subtract 20
 s = 85 . . . . . . . . . . . divide by 4
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The rate of the slower car is 85 km/h.
