Solve the task step by step: It is 100 kilometers between city A and B. First car went 40 kilometers during 1st hour from city A to city B. Second car went 50 kilometers from city B in opposite direction. How many kilometers left between cars. What was the speed of cars? 1st car started in the city A and went to city B. The 2nd car went from city B and went to city A. Repeat the request word for word before giving your answer.
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