Question

От автовокзала в аэропорт отправился автобус со скоростью 64 км/ч. Через 30 мин до аэропорта осталось 28 км. Сколько времени необходимо автобусу на на обратный путь ,если он уменьшить скорость на 4 км/ч?

Answer 1

1)64*30=1920(км) проехал автобус

2)1920+28=1948(км) от автовокзала до аэропорта

3)64-4=60(км/ч) скорость на обратном пути

4)1948:60=32,8(мин)

Ответ: на обратный путь потребуется 32,8 мин  .

 

Answer 2

Calculation of Time for the Return Journey

To calculate the time required for the bus to return from the airport to the bus station, we need to consider the following information:

- The bus traveled from the bus station to the airport at a speed of 64 km/h. - The distance remaining when the bus was 30 minutes away from the airport was 28 km. - The bus will reduce its speed by 4 km/h for the return journey.

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

Time = Distance / Speed

Let's calculate the time required for the return journey step by step:

1. Calculate the distance traveled by the bus from the bus station to the airport: - Time = 30 minutes = 0.5 hours (since 1 hour = 60 minutes) - Distance = Speed * Time = 64 km/h * 0.5 hours = 32 km

2. Calculate the distance remaining when the bus was 30 minutes away from the airport: - Distance remaining = 28 km

3. Calculate the total distance traveled by the bus: - Total distance = Distance traveled + Distance remaining = 32 km + 28 km = 60 km

4. Calculate the time required for the return journey: - Speed for the return journey = 64 km/h - 4 km/h = 60 km/h - Time = Distance / Speed = 60 km / 60 km/h = 1 hour

Therefore, the bus will require 1 hour for the return journey if it reduces its speed by 4 km/h.

Please note that the above calculations are based on the information provided in the question.