The speed of the ship in still water is 23 km / h. The speed of the river is 3 km / h.

The speed of the ship in still water is 23 km / h. The speed of the river is 3 km / h. What route will the motor ship take in 3 hours along the river? Against the stream?

Find the speed downstream and upstream of the river:
23 + 3 = 26 (km / h);
23 – 3 = 20 (km / h).
We find the distance in 3 hours downstream and against:
26 * 3 = 78 (km) – downstream;
20 * 3 = 60 (km) – upstream.
Answer: the route of the motor ship along the river is 78 km, against the stream of 60 km.