Question

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

Answer 1

18,6+1,3=19,9 км/ч - скорость катера по течению
18,6-1,3=17,3 км/ч - скорость катера против течения
19,9*2=39,8 км - путь катера по течению
17,3*3=51,9 км - путь катера против течения
39,9+51,9=91,8 - км путь катера за 5 часов
Ответ:91,8 км

Answer 2

Calculating the Boat's Total Distance Traveled

To calculate the total distance traveled by the boat in 5 hours, we can use the formula: \[ \text{Total distance} = \text{Speed} \times \text{Time} \]

The boat traveled for 3 hours against the current and 2 hours with the current. The boat's speed is 18.6 km/h, and the speed of the river's current is 1.3 km/h.

Distance traveled against the current: \[ \text{Distance} = \text{Speed} \times \text{Time} = 18.6 \, \text{km/h} \times 3 \, \text{h} = 55.8 \, \text{km} \]

Distance traveled with the current: \[ \text{Distance} = \text{Speed} \times \text{Time} = 18.6 \, \text{km/h} \times 2 \, \text{h} = 37.2 \, \text{km} \]

The total distance traveled by the boat in 5 hours is the sum of the distances traveled against and with the current: \[ 55.8 \, \text{km} + 37.2 \, \text{km} = 93 \, \text{km} \]

So, the boat traveled a total distance of 93 km in 5 hours.

Final Answer

The boat traveled a total distance of 93 km in 5 hours, given its speed of 18.6 km/h and the speed of the river's current at 1.3 km/h.