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Question : The distance between two places A and B is 140 km. Two cars $x$ and $y$ start simultaneously from A and B, respectively. If they move in the same direction, they meet after 7 hours. If they move towards each other, they meet after one hour. What is the speed (in km/hr) of car $y$ if its speed is more than that of car $x$?
Option 1: 60
Option 2: 100
Option 3: 80
Option 4: 90
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