If a train travelling at 72 km/h is to be brought to rest in a distance of 200m, then its retardation should be:-

If a train travelling at 72 km/h is to be brought to rest in a distance of 200m, then its retardation should be:-
A. `20 m//s^(2)`
B. `2m//s^(2)`
C. `10 m//s^(2)`
D. `1 m//s^(2)`

If a train travelling at 72 km/h is to be brought to rest in a distance of 200m, then its retardation should be:-

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