points A and B are 90 km apart from each other on a highway. A car starts from A and another from B at the same time. if they go in same direction they meet in 9 hours and if they go in opposite directions they meet in 9/7 hour's. find their speeds.
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jahan 5 ha waha 9 krlena jahan 1 ha waha 9/7 kr lena step same h
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