A boat goes 45 km upstream and come back to the starting point in a total time of 8 hours. If the speed of the stream is 25% of that of the boat in still water, then in how much time the boat will cover 75 km in downstream direction?
1
3 hours, 00 minutes
2
3 hours, 45 minutes
3
5 hours, 45 minutes
4
5 hours, 00 minutes