Time taken by a boat to cover a distance of 640 km in upstream is 25% more than the time taken to cover the same distance in downstream. If the speed of the stream is 1.25% of the distance then, find the total time taken by boat 1280 km in upstream and 1280 km in downstream. 

1
30 Hours
2
32 Hours
3
36 Hours
4
40 Hours
5
None of these

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