Question

На остров вверх по реке катер доставил туристов за 4 часа. Собственная скорость катера 24 км/час, а скорость течения реки-8 км/час. Сколько временизатратили туристы на обратный путь, если они возвращались по реке на плоту? Помогите Плиз

Answer 1

1) 4*(24-8)=64 км - весь путь
2) 64:8=8 ч - на обратный путь

Answer 2

Calculating the Time for the Return Journey

To calculate the time the tourists spent on the return journey, we can use the formula: \[ \text{Time} = \frac{\text{Distance}}{\text{Speed}} \]

The speed of the boat in still water is 24 km/h, and the speed of the river's current is 8 km/h. The boat's speed downstream is the sum of these speeds (24 km/h + 8 km/h), and its speed upstream is the difference between these speeds (24 km/h - 8 km/h).

Time Spent on the Return Journey

The time spent on the return journey can be calculated using the formula mentioned above. The distance for the return journey is the same as the distance for the initial journey.

Downstream Speed: \[ \text{Speed} = 24 \, \text{km/h} + 8 \, \text{km/h} = 32 \, \text{km/h} \]

Upstream Speed: \[ \text{Speed} = 24 \, \text{km/h} - 8 \, \text{km/h} = 16 \, \text{km/h} \]

Using the formula, we can calculate the time spent on the return journey.

Time Spent on the Return Journey: \[ \text{Time} = \frac{\text{Distance}}{\text{Speed}} \]

Let's calculate the time for the return journey.