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A train 75 metres long overtook a person (going in the same direction) who was walking at the rate of 6 km an hour,

A train 75 metres long overtook a person (going in the same direction) who was walking at the rate of 6 km an hour, and passed him in 7 seconds. Subsequently it overtook a second person (going in the same direction), and passed him in 6 seconds. At what rate was the second 3 4 person travelling? 1. 2 km/hr 2. 3 km/hr 3. 5 km/hr 4. 6 km/hr 5. None of these

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