A train covers a certain distance at a speed of 72 km/hr in 6 hours. To cover the same distance in 7(1/5) hours, it must have a speed of

A train covers a certain distance at a speed of 72 km/hr in 6 hours. To cover the same distance in 7(1/5) hours, it must have a speed of
1). 30 km/hr
2). 36 km/hr
3). 60 km/hr
4). 72 km/hr

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