A train 75 m long overtook a person who ...

A train 75 m long overtook a person who was walking at the rate of 6 km/ hr in the same direction and passed him in `7 1/2` seconds. Subsequently, it overtook a second person and passed him in `\ 6 3/4` seconds. At what rate vas the second person travelling? `1\ k m//h r` b. `2\ k m//h r` c. `5\ k m//h r` d. `4\ k m//h r`

15 km/h

`7.5` km/h

12 km/h

10 km/h

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