The boat’s own speed is 6.7 km / h; the current speed is 1.2 km / h; the boat was going against the current for 2 hours

The boat’s own speed is 6.7 km / h; the current speed is 1.2 km / h; the boat was going against the current for 2 hours, and in the course of 2 hours, what way did the boat go during these 4 hours?

The own speed of the boat, according to the condition, is 6.7 km / h, the speed of the current is 1.2 km / h, which means that the speed of the boat against the current of the river is:

6.7 – 1.2 = 5.5 (km / h) – boat speed against the river flow.

The boat sailed against the river for 2 hours, passing:

5.5 * 2 = 11 (km) – the boat sailed against the stream of the river.

Boat speed along the river:

6.7 + 1.2 = 7.9 (km / h) – boat speed along the river.

7.9 * 2 = 15.8 (km) – the boat sailed along the river.

15.8 + 11 = 26.8 (km).

Answer: 26.8 km.