Question

Собственная скорость катера 15 км/ч, а скорость течения реки 3,5 км/ч. Какой путь он проплывет за 2 часа по течению и за 3 часа против течения?

Answer 1

15км/ч +3,5км/ч = 18,5(км/ч) - скорость по течению
18,5км/ч·2ч=37(км) - проплывет катер по течению.
15км/ч -3,5км/ч = 11,5(км/ч) - скорость против течения
11,5км/ч·3ч. = 34,5(км) - проплывет против течения.
Если надо всего, то:
37км+34,5км=71,5(км) - весь путь.

Answer 2

Calculation of Distance Traveled

To calculate the distance traveled by the boat in different scenarios, we need to consider the boat's speed and the speed of the river current.

Given: - Boat speed: 15 km/h - River current speed: 3.5 km/h

Let's calculate the distance traveled by the boat in two different scenarios: 1. Traveling with the current for 2 hours. 2. Traveling against the current for 3 hours.

Traveling with the Current for 2 Hours

When the boat is traveling with the current, its effective speed is the sum of its own speed and the speed of the current. In this case, the boat's effective speed is 15 km/h + 3.5 km/h = 18.5 km/h.

To calculate the distance traveled, we can use the formula: distance = speed × time.

Substituting the values: - Speed = 18.5 km/h - Time = 2 hours

Distance traveled with the current for 2 hours = 18.5 km/h × 2 hours = 37 km.

Traveling Against the Current for 3 Hours

When the boat is traveling against the current, its effective speed is the difference between its own speed and the speed of the current. In this case, the boat's effective speed is 15 km/h - 3.5 km/h = 11.5 km/h.

Using the same formula as before: - Speed = 11.5 km/h - Time = 3 hours

Distance traveled against the current for 3 hours = 11.5 km/h × 3 hours = 34.5 km.

Therefore, the boat will travel a distance of 37 km with the current for 2 hours and a distance of 34.5 km against the current for 3 hours.

I hope this helps! Let me know if you have any further questions.