Two cities X and Y are connected by a regular bus service with a bus leaving in either direction every T min. A girl is driving scooty with a speed of 60 km/h

Two cities X and Y are connected by a regular bus service with a bus leaving in either direction every T min. A girl is
driving scooty with a speed of 60 km/h in the direction X to Y notices that a bus goes past her every 30 minutes in the
direction of her motion, and every 10 minutes in the opposite direction. Choose the correct option for the period T of
the bus service and the speed (assumed constant) of the buses. 

(1) 9 min, 40 km/h                       (2) 25 min, 100 km/h 

(3) 10 min, 90 km/h                    (4) 15 min, 120 km/h                                                                     (NEET-2025)