Question

Помогите, пожалуйста! Путешественник проплыл по реке на плоту 75 км за 25ч .Обратно он вернулся на моторной лодке, собственная скорость которой 28км/ч. сколько время ни потратил на обратный путь?

Answer 1

1) 75 : 25 = 3(км/ч) - скорость плота по течению = скорости течения реки
2) 28 - 3 = 25 (км/ч) - скорость катера против течения
3) 75 : 25 = 3 (часа)
Ответ: 3 часа - время на обратную дорогу.

Answer 2

Problem Analysis

A traveler traveled 75 km on a raft in 25 hours. On the return journey, the traveler used a motorboat with a speed of 28 km/h. We need to calculate the time taken for the return journey.

Solution

To find the time taken for the return journey, we can use the formula:

Time = Distance / Speed

Let's calculate the time taken for the return journey.

Calculation

The distance traveled on the return journey is also 75 km, and the speed of the motorboat is 28 km/h.

Time = Distance / Speed

Time = 75 km / 28 km/h

Using the formula, we can calculate the time taken for the return journey.

Answer

The traveler spent approximately 2.68 hours on the return journey.

Please note that the answer is approximate, as we rounded the result to two decimal places.

I hope this helps! Let me know if you have any further questions.