A boat travels for 6 min against the current from point A and then travels back in the direction of current for 6 min and reaches to point B. If AB is 800 meters apart, then find the speed of current also find the speed of boat if it can cover 420 km distance in 8 hours moving upstream.

1
6 km/hr and 48.5 km/hr
2
4 km/hr and 52.5 km/hr
3
4 km/hr and 56.5 km/hr
4
6 km/hr and 60 km/hr
5
5 km/hr and 62.5 km/hr

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