Question

2. Катер проплыл по течению реки 69 км, а на 34 км обратного пути он затратил 5 часов. Найдите скорость катера в стоячей воде, если скоростьтечения реки 3 км/ч. помогите, сделайте с дано и решением!!!! 40 баллов ​

Answer 1

Ответ:

9,8 км/ч - скорость катера в стоячей воде

Решение:

Скорость течения реки 3 км ч.

34 км катер проплыл против течения реки.

Скорость катера по течению реки = собственная скорость + скорость течения реки

Скорость катера против течения реки = собственная скорость - скорость течения реки

Скорость катера в стоячей воде = собственной скорости

1. 34 км : 5 ч = 6,8 км/ч - скорость катера против течения реки

2. 6,8 км/ч + 3 км/ч = 9,8 км/ч - собственная скорость катера

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Т.к. скорость катера в стоячей воде равна собственной скорости катера, значит, скорость катера в стоячей воде = 9,8 км/ч

Answer 2

Finding the Speed of the Boat in Still Water

To find the speed of the boat in still water, we can use the formula: Speed of boat in still water = (Distance traveled in still water) / (Time taken in still water)

Given: - Distance traveled with the current = 69 km - Distance traveled against the current = 34 km - Time taken against the current = 5 hours - Speed of the river's current = 3 km/h

Solution

First, let's find the speed of the boat when traveling against the current: Speed of boat against the current = (Distance traveled against the current) / (Time taken against the current)

Speed of boat against the current = 34 km / 5 hours = 6.8 km/h

Now, we can use the concept that the speed of the boat in still water is the average of the speed of the boat when traveling with and against the current. We can use the following formula to find the speed of the boat in still water: Speed of boat in still water = (Speed of boat with the current + Speed of boat against the current) / 2

Speed of boat in still water = (6.8 km/h + 3 km/h) / 2 = 9.8 km/h

So, the speed of the boat in still water is 9.8 km/h.

This calculation is based on the given information and the formula for finding the speed of the boat in still water.