Question

Пожалуйста помогите !Расстояние между двумя причалами 35 км . Сколько времени потратит теплоход на путь по реке от одного причала до другого и обратно, если собственная скорость теплохода 17 км/ч , а скорость течения реки - 3 км/ч ?

Answer 1

17+3=20(км\ч)- скорость по течению

35:20=1,75(ч)

17-3=14(км\ч)- скорость против течения

35:14=2,5(ч)-  

1,75+2,5=4,25(ч)- уйдёт на весь путь 

Answer 2

Calculation of Time Taken by the Ship

To calculate the time taken by the ship to travel from one pier to another and back, we need to consider the distance between the piers, the speed of the ship, and the speed of the river current.

Given: - Distance between the piers: 35 km - Speed of the ship: 17 km/h - Speed of the river current: 3 km/h

To find the time taken by the ship, we can use the formula:

Time = Distance / Speed

Since the ship is traveling from one pier to another and then back, we need to consider the total distance traveled, which is twice the distance between the piers.

Let's calculate the time taken by the ship:

1. Calculate the total distance traveled: - Distance from one pier to another: 35 km - Distance from the other pier back to the first pier: 35 km - Total distance traveled: 35 km + 35 km = 70 km

2. Calculate the effective speed of the ship: - The speed of the ship is the difference between its speed and the speed of the river current. - Effective speed of the ship = Speed of the ship - Speed of the river current = 17 km/h - 3 km/h = 14 km/h

3. Calculate the time taken by the ship: - Time = Total distance traveled / Effective speed of the ship - Time = 70 km / 14 km/h = 5 hours

Therefore, the ship will take approximately 5 hours to travel from one pier to another and back, given its speed of 17 km/h and the river current speed of 3 km/h.