Question

Решите задачу))) Лодка плыла 1,6ч по течению реки и 3,4ч против течения.Какой путь проплыла лодка за всё время движения если собственная скорость лодки 17,9км?ПОМОГИТЕ ПОЖАЛУЙСТА))))​

Answer 1

Ответ:

89,5

Пошаговое объяснение:

1)1,6ч*17,9=28,64(км)

2)3,4*17,9=60,86(км)

3)28,64+60,86=89,5(п)

Answer 2

#### Problem Analysis We are given that a boat travels for 1.6 hours with the current of a river and for 3.4 hours against the current. We need to find the total distance traveled by the boat if its own speed is 17.9 km/h. #### Solution To solve this problem, we can use the formula: distance = speed × time. Let's calculate the distance traveled by the boat with the current and against the current separately. **Distance traveled with the current:** - Speed of the boat with the current = own speed + speed of the current - Time traveled with the current = 1.6 hours **Distance traveled against the current:** - Speed of the boat against the current = own speed - speed of the current - Time traveled against the current = 3.4 hours Now, let's calculate the distances using the given information. **Distance traveled with the current:** - Speed of the boat with the current = 17.9 km/h + speed of the current - Time traveled with the current = 1.6 hours **Distance traveled against the current:** - Speed of the boat against the current = 17.9 km/h - speed of the current - Time traveled against the current = 3.4 hours To find the total distance traveled by the boat, we can add the distances traveled with and against the current. **Total distance traveled by the boat:** - Total distance = distance traveled with the current + distance traveled against the current Let's calculate the total distance traveled by the boat. #### Calculation Let's assume the speed of the current is 'c' km/h. **Distance traveled with the current:** - Speed of the boat with the current = 17.9 km/h + c km/h - Time traveled with the current = 1.6 hours - Distance traveled with the current = (17.9 km/h + c km/h) × 1.6 hours **Distance traveled against the current:** - Speed of the boat against the current = 17.9 km/h - c km/h - Time traveled against the current = 3.4 hours - Distance traveled against the current = (17.9 km/h - c km/h) × 3.4 hours **Total distance traveled by the boat:** - Total distance = (17.9 km/h + c km/h) × 1.6 hours + (17.9 km/h - c km/h) × 3.4 hours Now, let's simplify the equation and calculate the total distance traveled by the boat. #### Calculation Continued Total distance = (17.9 km/h + c km/h) × 1.6 hours + (17.9 km/h - c km/h) × 3.4 hours = 28.64 km + 1.6c km + 60.86 km - 3.4c km = 89.5 km - 1.8c km Therefore, the total distance traveled by the boat is 89.5 km - 1.8c km. #### Answer The boat traveled a distance of **89.5 km - 1.8c km** in total, where 'c' represents the speed of the current in km/h. Please let me know if you need any further assistance!