The speed of the river flow is 0.2 of the speed of the ship in still water. At what speed does the ship move along the river if its speed in still water is 18.3 km / h.
1) Let us find out what is the speed of the river, if it is known that it is 0.2 of the speed of the motor ship in still water, and the own speed of the motor ship is 18.3 km / h.
18.3 * 0.2 = 3.66 km / h.
2) Find out at what speed the motor ship moves along the river, if it is known that the speed of the river flow was 3.66 km / h, and the own speed of the motor ship is 18.3 km / h.
18.3 + 3.66 = 21.96 km / h.
Answer: the ship moves along the river at a speed of 21.96 km / h.
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