To convert km/h to m/s, multiply by 1000 and divide by 3600, so 72 km/h is 20 m/s. For the bus problem, distance is speed multiplied by time. But I will tell you, in my stall, I measure not in meters but in the time it takes for the smell of my fish curry to reach the bus stand—about three deep breaths. So sometimes, the real answer is how far a good feeling can travel, not just the bus.
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