A boat going to a parallelogram shaped river along to its perimeter. The speed of boat is 19 km/hr and the speed of stream is 6 km/hr. The perimeter of parallelogram is 180 km. If boat goes to 40 km in upstream then how much time will taken to reach his starting point?
1
8.83 hours
2
8.93 hours
3
9.83 hours
4
9.93 hours
5
None of these