The boat sailed with the stream in 1, (3) hours 36 km. How many kilometers will the boat sail upstream
| January 10, 2021 | education
The boat sailed with the stream in 1, (3) hours 36 km. How many kilometers will the boat sail upstream in 2.5 hours if the river speed is 2, (6) km / h?
To solve the problem, first we find the speed of the boat along the river.
To do this, you need to divide the distance that he traveled in 1 1/3 hours by time.
In this case, we get:
36/1 1/3 = 27 km / h.
Find the speed of the boat in still water.
27 – 2 2/3 = 24 1/3 km / h.
Find the speed of the boat against the river.
24 1/3 – 2 2/3 = 21 2/3 km / h.
In order to determine how far the boat will travel against the river flow in 2.5 hours, it is necessary to multiply its speed against the river flow by the time.
21 2/3 * 2 1/2 = 54 1/6 km.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.
