Question

Глиссер, собственная скорость которого равна 20 км/ч, прошел по реке расстояние равное 60 км и вернулся обратно. Найдите скорость течения реки, если на весь путь глиссер затратил 6 ч 15 минут

Answer 1

Применена формула зависимости времени от скорости и пути

Answer 2

Calculation of River Current Speed

To find the speed of the river current, we can use the formula:

Speed of the glider + Speed of the river current = Total speed of the glider

Given that the glider's own speed is 20 km/h and it traveled a distance of 60 km in one direction and then returned, taking a total time of 6 hours and 15 minutes (or 6.25 hours), we can set up the equation as follows:

20 km/h + Speed of the river current = 60 km / 6.25 hours

To solve for the speed of the river current, we can rearrange the equation:

Speed of the river current = (60 km / 6.25 hours) - 20 km/h

Calculating this expression, we find:

Speed of the river current = 4 km/h

Therefore, the speed of the river current is 4 km/h.