Question

От одной пристани до другой против течения реки теплоход идёт 8 часов,а обратно 6 часов.Расстояние между пристанями 120 км.Какова скорость течения реки?

Answer 1

1)120/8=15(км/ч)-против течения
2)120/6=20(км/ч)-по течению
3)20-15=5(км/ч)-скорость реки

Answer 2

Calculation of River Current Speed

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

Speed = Distance / Time

Given that the distance between the two piers is 120 km, and the time it takes for the boat to travel from one pier to the other against the current is 8 hours, we can calculate the speed of the boat against the current:

Speed against current = Distance / Time against current = 120 km / 8 hours = 15 km/h.

Similarly, the time it takes for the boat to travel from one pier to the other with the current is 6 hours. Using the same formula, we can calculate the speed of the boat with the current:

Speed with current = Distance / Time with current = 120 km / 6 hours = 20 km/h.

Calculation of River Current Speed

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

Speed = Distance / Time

Given that the distance between the two piers is 120 km, and the time it takes for the boat to travel from one pier to the other against the current is 8 hours, we can calculate the speed of the boat against the current:

Speed against current = Distance / Time against current = 120 km / 8 hours = 15 km/h.

Similarly, the time it takes for the boat to travel from one pier to the other with the current is 6 hours. Using the same formula, we can calculate the speed of the boat with the current:

Speed with current = Distance / Time with current = 120 km / 6 hours = 20 km/h