Question

автобус выехал из пункта А в пункт В. известно , что средняя его скорость составила 60 км,ч . сколько времени он провел в пути , если расстояние между городами 120 км.ч ?? Если бы средняя скорость составила 55 км.ч ??? На сколько процентов изменился бы при этом ответ ??

Answer 1

Время пути автобуса t=S/V = 120/60 = 2 часа

Если V=55 км/час  t = 120/55 = 2 часа 11 мин.

Ответ изменился на 9%

Answer 2

1) 120:60=2 часа  в пути

2)120:55=120/55=24/11часа в пути

3) 24/11:2*100%=109%

4) во втором случае время в пути увеличилось по сравнению с первоначаотным увеличилось приблизительно на 9%

Answer 3

Calculation of Time Spent on the Journey

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

Time = Distance / Speed

Given that the distance between the cities is 120 km and the average speed is 60 km/h, we can substitute these values into the formula:

Time = 120 km / 60 km/h

Simplifying the equation, we find:

Time = 2 hours

Therefore, the bus spent 2 hours on the journey from point A to point B.

Calculation with a Different Average Speed

If the average speed of the bus was 55 km/h instead of 60 km/h, we can use the same formula to calculate the time spent on the journey:

Time = Distance / Speed

Substituting the values, we have:

Time = 120 km / 55 km/h

Simplifying the equation, we find:

Time ≈ 2.18 hours

Therefore, if the average speed of the bus was 55 km/h, it would have taken approximately 2.18 hours to complete the journey.

Percentage Change in Time

To calculate the percentage change in time, we can use the formula:

Percentage Change = (New Value - Old Value) / Old Value * 100

Substituting the values, we have:

Percentage Change = (2.18 hours - 2 hours) / 2 hours * 100

Simplifying the equation, we find:

Percentage Change ≈ 9%

Therefore, if the average speed of the bus changed from 60 km/h to 55 km/h, the time spent on the journey would increase by approximately 9%.