Question

Сколько километров пройдет моторная лодка за 4 ч, двигаясь против течения реки, если ее собственная скорость 22 км/ч, а скорость течения составляет  собственной скорости лодки?

Answer 1

Какая скорость течения?

Answer 2

Если скорость лодки 5/44 скорости катера, то ее скорость против течения=22-5/44*22=22-2,5=19,5 (км\ч) .
Тогда путь, пройденный лодкой=4*19,5=78(км) .
Ответ: 78 км.

Answer 3

Calculation of Distance Traveled by Motorboat

To calculate the distance traveled by a motorboat in 4 hours while moving against the current of a river, we need to consider the boat's own speed and the speed of the current.

Given: - The motorboat's own speed is 22 km/h. - The speed of the current is equal to the motorboat's own speed.

To calculate the distance traveled, we can use the formula:

Distance = Speed × Time

In this case, the speed of the motorboat is the difference between its own speed and the speed of the current, as it is moving against the current.

Let's calculate the distance traveled:

Speed of the motorboat relative to the current = Motorboat's own speed - Speed of the current

Substituting the given values:

Speed of the motorboat relative to the current = 22 km/h - 22 km/h = 0 km/h

Since the speed of the motorboat relative to the current is 0 km/h, it means that the motorboat is not making any progress against the current. Therefore, the distance traveled by the motorboat in 4 hours while moving against the current of the river would be 0 kilometers.

Please note that the motorboat's own speed and the speed of the current were provided in the question, and the calculation was done based on those values.