Question

Собственная скорость теплохода 38 км/ч, а скорость течения реки 2 км/ч. сколько времени затратит теплоход на путь от одного причала до другого и обратно, если расстояние между причалами 360 км?

Answer 1

Общая скорость у теплохода будет равна 40км/ч, т.к есть и его собственная скорость и скорость воды, тк он плывет по течению. S=Vt, a t =S:V. t=360:40=9 часов.туда а обратно общая скорость будет 36км/ч=> 360:36=10ч обратно

Answer 2

1)360:(38+2)=9(час)-необходимо времени чтобы приплыть к станции
    2)360:(38-2)=10(час)-необходимо времени чтобы приплыть к станции
   
Ответ:9(час)-необходимо времени чтобы приплыть к станции,10(час)-необходимо времени чтобы приплыть к станции

Answer 3

Calculation of Time Taken by the Boat

To calculate the time taken by the boat to travel from one pier to another and back, we need to consider the boat's speed and the speed of the river current.

Given: - Boat's speed: 38 km/h - River current speed: 2 km/h - Distance between piers: 360 km

To calculate the time taken by the boat, we can use the formula:

Time = Distance / Speed

Since the boat is traveling both ways (from one pier to another and 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 boat:

1. Calculate the time taken by the boat to travel from one pier to another: - Distance: 360 km - Boat's speed: 38 km/h - River current speed: 2 km/h

Using the formula, we can calculate the time taken for one leg of the journey:

Time for one leg = Distance / (Boat's speed + River current speed)

Substituting the values:

Time for one leg = 360 km / (38 km/h + 2 km/h)

Simplifying the equation:

Time for one leg = 360 km / 40 km/h

Time for one leg = 9 hours

2. Since the boat needs to travel both ways, we need to consider the return journey as well. Therefore, the total time taken by the boat will be twice the time for one leg:

Total time = 2 * Time for one leg

Substituting the value:

Total time = 2 * 9 hours

Total time = 18 hours

Therefore, the boat will take approximately 18 hours to travel from one pier to another and back, considering a boat speed of 38 km/h and a river current speed of 2 km/h, with a distance of 360 km between the piers.