Question

Катер шел 3ч против течения реки и 2ч по течению. Какой путь прошел катер за эти 5ч, если собственая скорость катера 18,6км/ч , а скорость течения реки 1,3км/ч

Answer 1

V по течению = 18,6+1,3=19,9 км/ч
V против течения = 18,6-1,3=17,3
S=2*19,9+3*17,3=39,8+51,9=91,7 км

Answer 2

Problem Analysis

We are given the following information: - The boat traveled for 3 hours against the current of the river. - The boat traveled for 2 hours with the current of the river. - The boat's own speed is 18.6 km/h. - The speed of the river's current is 1.3 km/h.

We need to calculate the total distance traveled by the boat in these 5 hours.

Calculation

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

Distance = Speed x Time

Let's calculate the distance traveled against the current and with the current separately.

Distance traveled against the current: - Speed of the boat = 18.6 km/h - Speed of the current = 1.3 km/h - Time = 3 hours

Distance against the current = (Speed of the boat - Speed of the current) x Time

Distance against the current = (18.6 km/h - 1.3 km/h) x 3 hours

Distance against the current = 17.3 km/h x 3 hours

Distance against the current = 51.9 km

Distance traveled with the current: - Speed of the boat = 18.6 km/h - Speed of the current = 1.3 km/h - Time = 2 hours

Distance with the current = (Speed of the boat + Speed of the current) x Time

Distance with the current = (18.6 km/h + 1.3 km/h) x 2 hours

Distance with the current = 19.9 km/h x 2 hours

Distance with the current = 39.8 km

Now, let's calculate the total distance traveled by adding the distances against and with the current:

Total distance traveled = Distance against the current + Distance with the current

Total distance traveled = 51.9 km + 39.8 km

Total distance traveled = 91.7 km

Therefore, the boat traveled a total distance of 91.7 km in these 5 hours.

Answer

The boat traveled a total distance of 91.7 km in these 5 hours.