The boat sailed for 2 hours at a speed of 12.3 km / h and 4 hours at a speed of 13.2 km / h.

The boat sailed for 2 hours at a speed of 12.3 km / h and 4 hours at a speed of 13.2 km / h. Find the average speed of the boat along the way.

1. Let’s determine what distance the boat has sailed in 2 hours at a speed of 12.3 km / h:

2 * 12.3 = 24.6 km;

2. Determine what distance the boat sailed in 3 hours at a speed of 13.2 km / h:

13.2 * 3 = 39.6 km;

3. Determine how far the boat has sailed in general:

24.6 +39.6 = 64.2 km;

4. Determine how long the boat sailed in total:

2 + 3 = 5 hours;

5. Let’s find what is the average speed of movement of the boat:

64.2: 5 = 12.84 km / h.

Answer: the average speed of the boat is 12.84 km / h.