Question

собственная скорость лодки 10 километров в час а скорость течения реки 2, 8 км /ч. сначала лодка шла 2,6ч против течения, затем 1,4ч по течению. какой путь прошла лодка за все время

Answer 1

Ответ:

1) (10-2,8) •2, 6 = 18,72(км)

2) (10+2, 8) •1, 4 = 17,92(км)

3) 18,72+17, 92=36, 64(км)

Answer 2

Calculation of the Boat's Total Distance Traveled

To calculate the total distance traveled by the boat, we need to consider the time it spent traveling against the current and the time it spent traveling with the current.

Given information: - Boat's speed: 10 km/h - River's current speed: 2.8 km/h

The boat initially traveled against the current for 2.6 hours and then traveled with the current for 1.4 hours.

To calculate the distance traveled against the current, we multiply the boat's speed by the time: Distance against current = Speed of boat * Time against current

To calculate the distance traveled with the current, we multiply the sum of the boat's speed and the current speed by the time: Distance with current = (Speed of boat + Speed of current) * Time with current

Finally, we add the distances traveled against and with the current to get the total distance traveled by the boat.

Let's calculate the distances:

Distance against current = 10 km/h * 2.6 hours = 26 km

Distance with current = (10 km/h + 2.8 km/h) * 1.4 hours = 16.8 km

Total distance traveled = Distance against current + Distance with current = 26 km + 16.8 km = 42.8 km

Therefore, the boat traveled a total distance of 42.8 kilometers during the given time period.

Please note that the calculations are based on the provided information and assume a constant speed for the boat and the river's current.