Question

Собственная скорость лодки 7,85км/ч. Скорость течения 2,6км/ч. За какое время лодка проплывёт по течению реки расстояние , равное 12,54км?

Answer 1

12.54 / (7.85+2.6) = 12.54 / 10.45 = 1.2 часа

Answer 2

7,5км/ч + 2,6км/ч = 10,1км/ч - скорость лодки по течению 2. 12,54км : 10,1км/ч ( посчитай) Ответ:

Answer 3

Calculation of Time Taken by the Boat

To calculate the time taken by the boat to travel a distance of 12.54 km against a current, we need to consider the relative velocities of the boat and the current.

The speed of the boat is given as 7.85 km/h, and the speed of the current is given as 2.6 km/h.

The relative velocity of the boat against the current can be calculated by subtracting the speed of the current from the speed of the boat:

Relative velocity = Boat speed - Current speed

Substituting the given values:

Relative velocity = 7.85 km/h - 2.6 km/h = 5.25 km/h

Now, we can calculate the time taken by the boat to travel a distance of 12.54 km using the formula:

Time = Distance / Relative velocity

Substituting the given values:

Time = 12.54 km / 5.25 km/h

Calculating the result:

Time = 2.38857142857 hours

Therefore, the boat will take approximately 2.39 hours to travel a distance of 12.54 km against the current of 2.6 km/h.