Question

Собственная скорость моторной лодки 6,7 км/ч. Скорость течения реки 1,2 км/ч. Лодка шла 2ч против течения и 2ч по течению реки. Какой путь прошла моторная лодка за эти 4ч?

Answer 1

6.7+1.2=7,9км/ч-скорость лодки и течения вместе
7.9х2=15.8 км расстояние по течению
6,7-1,2=5,5 км/ч
5,5х2=11 км
11+15,8=26,8 км

Answer 2

6,7-1,2=5,5 км/ч скорость против течения
5,5*2=11 км прошел против течения
6,7+1,2=7,7 км/ч скорость по течению
7,7*2=15,4 км прошел по течению
11+15,4=26,4 км путь лодки

Answer 3

Problem Analysis

We are given the following information: - The speed of the motorboat is 6.7 km/h. - The speed of the river current is 1.2 km/h. - The boat traveled against the current for 2 hours. - The boat traveled with the current for 2 hours.

We need to calculate the distance traveled by the motorboat in these 4 hours.

Calculation

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

Distance = Speed x Time

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

1. Distance traveled against the current: - Speed of the motorboat = 6.7 km/h - Speed of the river current = 1.2 km/h - Time = 2 hours

Using the formula, we can calculate the distance traveled against the current:

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

2. Distance traveled with the current: - Speed of the motorboat = 6.7 km/h - Speed of the river current = 1.2 km/h - Time = 2 hours

Using the formula, we can calculate the distance traveled with the current:

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

3. Total distance traveled: The total distance traveled by the motorboat is the sum of the distances traveled against the current and with the current.

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

Let's calculate the distances using the given values.

Calculation Steps

1. Distance traveled against the current: - Speed of the motorboat = 6.7 km/h - Speed of the river current = 1.2 km/h - Time = 2 hours

Distance against the current = (6.7 - 1.2) x 2 = 11.0 km

2. Distance traveled with the current: - Speed of the motorboat = 6.7 km/h - Speed of the river current = 1.2 km/h - Time = 2 hours

Distance with the current = (6.7 + 1.2) x 2 = 15.8 km

3. Total distance traveled: Total distance = 11.0 km + 15.8 km = 26.8 km

Therefore, the motorboat traveled a total distance of 26.8 km in these 4 hours.

Answer

The motorboat traveled a total distance of 26.8 km in these 4 hours.