Physics · Kinematics
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 a scooter with a speed of 60 km/h in the direction X to Y and 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.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 115 min, 120 km/h✓
- 210 min, 90 km/h
- 325 min, 100 km/h
- 49 min, 40 km/h
Correct answer
15 min, 120 km/h
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