A train covers a certain distance in 210 minutes at a speed of 60 km/hr. The time taken by the train, to covers the same distance at a speed of 80 km/hr is :
[A] 3\frac{5}{8}\ hours
[B] 2\frac{5}{8}\ hours
[C] 4\frac{5}{8}\ hours
[D] 3\ hours

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