Question

Лодка плыла 1,8 ч по течению реки и 2,6 ч против течения. Какой путь проплыла лодка за всё время движения, если скорость течения равна 2,4 км/ч, а собственная скорость лодки- 18,9 км/ч?

Answer 1

18,9+2,4=21,3 км/ч скорость по течению
18,9-2,4=16,5 км/ч против течения
1,8*21,3+2,6*16,5=84,24 км
путь проплыла лодка за всё время движения

Answer 2

(18,9+2,4)*1,8=38,34(км)-по течению
(18,9-2,4)*2,6=42,9(км)-против течения
38,34+42,9=81,24(км)-весь путь
Ответ:81,24 км

Answer 3

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 with the current and against the current.

Given information: - Time traveled with the current: 1.8 hours - Time traveled against the current: 2.6 hours - Speed of the current: 2.4 km/h - Speed of the boat: 18.9 km/h

To calculate the distance traveled with the current, we can use the formula:

Distance = Speed × Time

Using this formula, the distance traveled with the current can be calculated as:

Distance with current = Speed of the boat + Speed of the current × Time traveled with the current

Substituting the given values:

Distance with current = 18.9 km/h + 2.4 km/h × 1.8 hours

To calculate the distance traveled against the current, we can use the same formula:

Distance against current = Speed of the boat - Speed of the current × Time traveled against the current

Substituting the given values:

Distance against current = 18.9 km/h - 2.4 km/h × 2.6 hours

Finally, to calculate the total distance traveled, we can add the distances traveled with and against the current:

Total distance traveled = Distance with current + Distance against current

Let's calculate the distances using the given values:

Distance with current = 18.9 km/h + 2.4 km/h × 1.8 hours = 18.9 km/h + 4.32 km = 23.22 km

Distance against current = 18.9 km/h - 2.4 km/h × 2.6 hours = 18.9 km/h - 6.24 km = 12.66 km

Total distance traveled = 23.22 km + 12.66 km = 35.88 km

Therefore, the boat traveled a total distance of 35.88 km during its entire journey.