To find the total distance the boat has sailed, we need to calculate the distance covered during the first seven hours and the distance covered during the next six hours and then sum them up.
Distance covered during the first seven hours:
Speed = 80 km/h
Time = 7 hours
Distance = Speed * Time
Distance = 80 km/h * 7 hours
Distance = 560 km
Distance covered during the next six hours:
Speed = 95 km/h
Time = 6 hours
Distance = Speed * Time
Distance = 95 km/h * 6 hours
Distance = 570 km
Total distance covered = Distance during first seven hours + Distance during next six hours
Total distance covered = 560 km + 570 km
Total distance covered = 1130 km
Therefore, the boat has sailed a total distance of 1130 kilometers.