A boat sailed for 7 hours at the speed of 80 km/h. It changed its speed to 95 km/h for the next 6 hours. How far had boat sailed in km.

1130km

Explanation:

Initial Time taken by boat = 7 hours

Initial speed of boat = 80 km/h

New speed of boat = 95 km/h

New time taken by boat = 6 hours

Total distance sailed by boat = ?

Recall that speed is the total distance travelled divided by the total time taken.

i.e Speed = distance / Time taken

Distance = speed x time taken

So, from the data provided we will calculate the distance travelled in under the two conditions

In 1st case: distance = 80 km/h x 7 hours

distance = 560 km

In 2nd case: distance = 95km/h x 6hours

distance = 570 km

Hence, total distance = 560km + 570km

= 1130km

Thus, the boat had sailed 1130 kilometers far