Question

1. Скорость катера в стоячей воде 15,8 км/ч, а скорость течения реки 1,7 км/ч. Сколько километров катер пройдёт за 2 ч против течения и за 3 ч по течению реки?

Answer 1

1) км за 2 ч против течения
S=vt= (15,8 - 1,7 км/ч) * 2 ч = 28,2 км
2) по течению 
S= (15,8 + 1,7 ) * 3 = 52,5 км

Answer 2

Calculation of Distance Traveled by the Boat

To calculate the distance traveled by the boat in different scenarios, we need to consider the boat's speed in still water and the speed of the river's current.

Given: - Speed of the boat in still water: 15.8 km/h - Speed of the river's current: 1.7 km/h

We need to calculate the distance traveled by the boat in two different scenarios: 1. Against the current for 2 hours. 2. With the current for 3 hours.

Let's calculate the distance traveled in each scenario:

Distance Traveled Against the Current for 2 Hours

To calculate the distance traveled against the current, we need to subtract the speed of the current from the speed of the boat in still water and then multiply it by the time traveled.

The formula is as follows: Distance = (Speed of the boat in still water - Speed of the current) * Time

Substituting the given values: Distance = (15.8 km/h - 1.7 km/h) * 2 hours

Calculating the distance: Distance = 14.1 km/h * 2 hours = 28.2 km

Therefore, the boat will travel 28.2 kilometers against the current for 2 hours.

Distance Traveled With the Current for 3 Hours

To calculate the distance traveled with the current, we need to add the speed of the current to the speed of the boat in still water and then multiply it by the time traveled.

The formula is as follows: Distance = (Speed of the boat in still water + Speed of the current) * Time

Substituting the given values: Distance = (15.8 km/h + 1.7 km/h) * 3 hours

Calculating the distance: Distance = 17.5 km/h * 3 hours = 52.5 km

Therefore, the boat will travel 52.5 kilometers with the current for 3 hours.

In summary: - The boat will travel 28.2 kilometers against the current for 2 hours. - The boat will travel 52.5 kilometers with the current for 3 hours.

Please let me know if there's anything else I can help you with!