Question

От автовокзала в аэропорт отправился автобус со скоростью 64 километра в час.Через 30 минут до аэропорта ему осталось проехать 28 километров.Сколько времени необходимо автобусу на обратный путь от аэропорта до автовокзала если он уменьшит скорость на 4 километра в час ответ с пояснением

Answer 1

30 мин. автобус ехавший со скоростью 64 км/ч проехал 32 км. 30 мин это 0,5 часа
64*0,5=32 км
еще осталось проехать 28 км, значит 32+28=60 км всего 
обратно он ехал на 4 км/ч медленее, т.е 64-4=60 км/ч скорость в обратном направлении,
60км/ч : 60 км= 1 час - понадобилось на обратный путь

Answer 2

1)64:2=32км-он проехал за 30 мин
2)32+28=60км-расстояние от вокзала до аэропорта
3)60:(64-4)=1час-необходимо автобусу на обратный путь

Answer 3

Problem Analysis

We are given that a bus travels from the bus station to the airport at a speed of 64 kilometers per hour. After 30 minutes, the bus has 28 kilometers left to travel to reach the airport. We need to determine how much time it will take for the bus to travel back from the airport to the bus station if it reduces its speed by 4 kilometers per hour.

Solution

To find the time it will take for the bus to travel back from the airport to the bus station, we need to calculate the distance and divide it by the reduced speed of the bus.

Let's calculate the distance the bus needs to travel back from the airport to the bus station. We know that the distance from the bus station to the airport is the same as the distance from the airport to the bus station. Therefore, the distance the bus needs to travel back is also 28 kilometers.

Now, let's calculate the time it will take for the bus to travel back from the airport to the bus station. We can use the formula:

Time = Distance / Speed

The reduced speed of the bus is 64 kilometers per hour - 4 kilometers per hour = 60 kilometers per hour.

Substituting the values into the formula, we get:

Time = 28 kilometers / 60 kilometers per hour

Calculating this, we find:

Time = 0.4667 hours

To convert this time to minutes, we multiply by 60:

Time = 0.4667 hours * 60 minutes per hour

Calculating this, we find:

Time = 28 minutes

Therefore, it will take the bus 28 minutes to travel back from the airport to the bus station at a reduced speed of 60 kilometers per hour.

Answer

The bus will take 28 minutes to travel back from the airport to the bus station at a reduced speed of 60 kilometers per hour.