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2 towns a & b are connected with a regular bus service with a bus leaving in t direction every t minutes.a man cycling with a speed of20 km per hr in direction a to b notices that a bus goes past him every 18 min in dir of his motion. & every 6 min in opp dir.what is the period t of bus service

 2 towns a & b are connected with a regular bus service with a bus leaving in t direction every t minutes.a man cycling with a speed of20 km per hr in direction a to b notices that a bus goes past him every 18 min in dir of his motion. & every 6 min in opp dir.what is the period t of bus service

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