Abus and a car move towards each other. the speed of the bus is 50 km per hour, and the speed of the car is 70 km per hour. how much closer to each other are they becoming every hour?

Each hour, the bus moves 50 km closer to their meeting point, while the car moves 70 km closer. That is, the distance between them is reduced by 
   50 km + 70 km = 120 km
each hour.

They are becoming 120 km closer to each other every hour.

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