Question

теплоход за 3 часа прошёл вверх по реке 69 км. собственная скорость теплохода 25км.час. Какова скорость течения реки?

Answer 1

хкм/ч-скорость течения реки

(25-х)*3=69

25-х=69:3

25-х=23

х=25-23

х=2км/ч.

Ответ:2км/ч. скорость течения реки.

Answer 2

Пусть Х км/ч-скорость течения реки, тогда получаем такое уравнение:

(25-х)*3=69

25-х=23

х=25-23

х=2

2 км/ч- скорость течения реки

Answer 3

Calculating the River's Current Speed

To calculate the speed of the river's current, we can use the formula:

Speed of the boat in still water = Speed of the boat against the current + Speed of the current

Given: - The boat traveled 69 km in 3 hours upstream. - The boat's own speed is 25 km/h.

We can use the formula to find the speed of the current.

Calculation

Let's denote the speed of the current as C.

The speed of the boat against the current is the difference between the boat's own speed and the speed of the current, so it is 25 - C.

The distance traveled upstream is 69 km, and the time taken is 3 hours. We can use the formula distance = speed × time to find the speed of the current.

Using the given information, we can set up the equation: 69 = (25 - C) × 3

Solving for C: 69 = 75 - 3C 3C = 75 - 69 3C = 6 C = 2

Answer

The speed of the river's current is 2 km/h.