Question

Моторная лодка 2 ч плыла по течению реки и 3 ч против течения. Собственная скорость моторной лодки 19,5км/ч, скорость течения реки 2,8 км/ч. Какое расстояние проплыла моторная лодка?

Answer 1

1)19,5+2.8=22,3(км/ч) скорость по течению

2)19,5-2,8=16,7(км/ч)скорость против течения

3)22,3*=44,6 (км) по течению

4)16,7*3= 50,1(км)против течения

5) 44,6+50,1=94,7(км)-весь путь

Answer 2

Calculation of Distance Traveled by the Motorboat

To calculate the distance traveled by the motorboat, we need to consider the time it spent traveling with the current and against the current, as well as the speed of the boat and the speed of the river current.

Given information: - Time spent traveling with the current: 2 hours - Time spent traveling against the current: 3 hours - Speed of the motorboat: 19.5 km/h - Speed of the river current: 2.8 km/h

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

Distance = Speed x Time

Using the given values, the distance traveled with the current can be calculated as:

Distance with current = Speed with current x Time with current

Substituting the values:

Distance with current = 19.5 km/h x 2 hours

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

Distance against current = Speed against current x Time against current

Substituting the values:

Distance against current = 19.5 km/h x 3 hours

To find the total distance traveled by the motorboat, we can add the distances traveled with and against the current:

Total distance = Distance with current + Distance against current

Let's calculate the distances:

Distance with current = 19.5 km/h x 2 hours = 39 km

Distance against current = 19.5 km/h x 3 hours = 58.5 km

Total distance = 39 km + 58.5 km = 97.5 km

Therefore, the motorboat traveled a total distance of 97.5 km.