A problem by Vinay Manjunath

Level 2

A train 75 meters long overtook a person who was walking in the same direction at a speed of 6 km/hr and passed him within 15 seconds .Subsequently, it overtook a second person walking in the same direction ans passes him within 7.5 seconds. At what rate was the second person travelling ?

4.8 km/hr 2.4 km/hr 4.2 km/hr 1.2 km/hr

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