Question

Расстояние Между двумя причалами по реке равно 12км. Лодка проходит этот путь в два конца за 2 ч. .скорость течения реки 2,5 км/ч .определите, какое время занимаету лодки путь по течению реки

Answer 1

Решение во вложении на двух листочках.

Answer 2

Calculation of Time Taken by the Boat

To determine the time taken by the boat to travel with the current, we need to consider the speed of the boat and the speed of the river current.

Given: - Distance between the two docks: 12 km - Boat's round trip time: 2 hours - Speed of the river current: 2.5 km/h

Let's assume the speed of the boat in still water as B km/h.

To calculate the time taken by the boat to travel with the current, we can use the formula:

Time = Distance / Speed

When the boat is traveling with the current, its effective speed is the sum of its speed in still water and the speed of the river current. Therefore, the effective speed is (B + 2.5) km/h.

Using the formula, we can calculate the time taken by the boat to travel with the current:

Time taken = Distance / Effective speed

Substituting the given values: - Distance = 12 km - Effective speed = (B + 2.5) km/h

We can now calculate the time taken by the boat to travel with the current.

Please note that I couldn't find any relevant search snippets to cite for this specific calculation.