Question

Собственная скорость моторной лодки 6,7км\ч скорость течение реки 1,2км/ч лодка шла 2часа против течение и 2ч по течению реки. какой путь прошла моторная лодка за эти 4час

Answer 1

S=Vt
1. (6,7+1,2)x2=18км/ч - по течению.
2. (6,7-1,2)х2=11км/ч - против течения.
3. 11+18=29км/ч - общ.
4. 29х4=116км
Ответ: 116 км

Answer 2

Calculation of the Distance Traveled by the Motorboat

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

Given: - Speed of the motorboat: 6.7 km/h - Speed of the river current: 1.2 km/h - Time spent traveling against the current: 2 hours - Time spent traveling with the current: 2 hours

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

Distance = Speed × Time

The distance traveled against the current is:

Distance against current = Speed of the motorboat - Speed of the river current × Time against current

Substituting the given values:

Distance against current = (6.7 km/h - 1.2 km/h) × 2 hours

Calculating the distance against the current:

Distance against current = 5.5 km/h × 2 hours = 11 km

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

Distance with current = Speed of the motorboat + Speed of the river current × Time with current

Substituting the given values:

Distance with current = (6.7 km/h + 1.2 km/h) × 2 hours

Calculating the distance with the current:

Distance with current = 7.9 km/h × 2 hours = 15.8 km

Finally, to calculate the total distance traveled by the motorboat in 4 hours, we add the distances traveled against the current and with the current:

Total distance = Distance against current + Distance with current

Substituting the calculated values:

Total distance = 11 km + 15.8 km = 26.8 km

Therefore, the motorboat traveled a total distance of 26.8 km in the 4 hours, considering the speed of the boat and the river current.