A boat which covers 80 km distance downstream in 3 (1/3) hours and speed of the downstream is 20% more than the speed of the boat in still water If the boat covers  x km distance upstream for 4 hours. Find the time taken by the boat to cover the x km distance in downstream

1
6 hours
2
4 (2/3) hours
3
5 hours
4
2 (2/3) hours
5
4.5 hours

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