A swimmer swims in still water at a speed =5km/hr. He enters a 200m wide river, having river flow speed = 4km/hr at a point A and proceeds to swim at an angle of 1270(sin37∗−0.6) with the river flow direction. Another point B is located directly across A on the other side. The swimmer lands on the river bank at a point C. from which he walks the distance CB with a speed=3km/hr. The total time in which he reach from A to B is