Question

На остров вверх по реке катер доставил туристов за 4 ч, собственная скорость катера 24 км/ч, а скорость течения реки - 8 км/ч. Сколько времени затратили туристы на обратный путь, если они возвращались по реке на плоту?

Answer 1

1)24-8=16(км/ч)
2)16*4=64(км)
3)64:8=8(ч)

Answer 2

Calculating the Return Journey Time

To calculate the time the tourists spent on the return journey, we can use the formula:

Time = Distance / Speed

First, let's calculate the time it took for the tourists to reach the island.

Given: - Boat speed = 24 km/h - River current speed = 8 km/h - Time taken to reach the island = 4 hours

We can use the formula: Time = Distance / (Boat speed - River current speed)

Using the given time and speeds, we can calculate the distance to the island: 4 = Distance / (24 - 8)

Solving for Distance: Distance = 4 * (24 - 8)

Distance = 4 * 16 = 64 km

Now, let's calculate the time it took for the tourists to return on a raft.

Given: - River current speed = 8 km/h - Raft speed = x km/h (to be calculated)

We can use the formula: Time = Distance / (Raft speed + River current speed)

Using the calculated distance and the river current speed, we can calculate the time for the return journey: Time = 64 / (x + 8)

We can use this formula to calculate the time taken for the return journey.