The distance between quays A and B is 180 km. From city A to city B the steamer sailed along the river.

| February 27, 2021 | education

The distance between quays A and B is 180 km. From city A to city B the steamer sailed along the river. The steamer left town A at 9:00 and arrived in town B at 13:00. On the way, due to technical problems, a stop was made for 1 hour. Find the speed of the steamer on the return voyage if the river speed is 4 km / h.

Let us determine the time that this vessel was in motion, knowing that a stop was made for 1 hour on the way due to technical malfunctions:

13 – 9 – 1 = 3.

Let’s determine the speed with which the indicated vessel was moving along the current of the water stream:

180/3 = 60.

Let’s determine the own speed of the ship, knowing that the speed of the river is 4 km / h:

60 – 4 = 56.

Let’s determine the speed with which the ship went against the current:

56 – 4 = 52.

Answer: The speed of the motor ship against the current was 52 km / h.



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