Question

Помогите...срочно!!! Собственная скорость лодки 6,7 км в ч, скорость течения 2,2 км в ч. Лодка проплыла 2 часа против течения и 4 часа по течению реки. Какой путь проплыла лодка за это время? Даю 20 баллов!!!

Answer 1

1)(6,7-2,2)·2=9(км)-за 2 часа против течения
2)(6,7+2,2)·4=35,6(км)-за 4 часа по течению
3)35,6+9=44,7(км)-за всё время
________________________Ответ:44,6 км проплыла лодка за всё время.

Answer 2

Calculation of the Boat's Distance Traveled

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

Given: - Boat's own speed: 6.7 km/h - Speed of the current: 2.2 km/h - Time spent traveling against the current: 2 hours - Time spent traveling with the current: 4 hours

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

Distance = Speed × Time

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

Distance against current = (Boat's own speed - Speed of the current) × Time spent traveling against the current

Substituting the values:

Distance against current = (6.7 km/h - 2.2 km/h) × 2 hours

Simplifying the calculation:

Distance against current = 4.5 km/h × 2 hours = 9 km

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

Distance with current = (Boat's own speed + Speed of the current) × Time spent traveling with the current

Substituting the values:

Distance with current = (6.7 km/h + 2.2 km/h) × 4 hours

Simplifying the calculation:

Distance with current = 8.9 km/h × 4 hours = 35.6 km

Therefore, the total distance traveled by the boat in the given time is the sum of the distances traveled against the current and with the current:

Total distance = Distance against current + Distance with current

Substituting the calculated values:

Total distance = 9 km + 35.6 km = 44.6 km

So, the boat traveled a total distance of 44.6 kilometers in the given time.

Please note that the above calculations are based on the given information and assumptions.