Question

ПОМОГИТЕ! Автомобилист до соседнего города ехал 4 часа со скоростью 55 км/ч. На обратном пути он увеличил на 5 км/ч. Сколько всего времени длилась поездка в соседний город и обратно?

Answer 1

1) 55 * 4 = 220 км - расстояние между городами
2) 55 + 5 = 60 км/ч - скорость автомобилиста на обратном пути
3) 220 : 60 = 3 2/3 часа - время, затраченное на обратный путь
4) 4 + 3 2/3 = 7 2/3 часа - время, затраченное на дорогу до соседнего города и обратно

Ответ: 7 2/3 часа

Answer 2

Calculation of Total Travel Time

To calculate the total travel time for the round trip, we need to consider the time it took to travel to the neighboring city and the time it took to return.

Let's break down the problem step by step:

1. The driver traveled to the neighboring city for 4 hours at a speed of 55 km/h. This means that the distance between the two cities can be calculated using the formula:

Distance = Speed × Time

Therefore, the distance traveled to the neighboring city is:

Distance to Neighboring City = 55 km/h × 4 hours

2. On the return trip, the driver increased their speed by 5 km/h. So the speed on the return trip is:

Speed on Return Trip = 55 km/h + 5 km/h

3. To calculate the time it took to return, we can use the same formula as before:

Time = Distance / Speed

The distance traveled on the return trip is the same as the distance to the neighboring city.

Now, let's calculate the total travel time.

Calculation Steps:

1. Calculate the distance to the neighboring city: - Distance to Neighboring City = 55 km/h × 4 hours

2. Calculate the speed on the return trip: - Speed on Return Trip = 55 km/h + 5 km/h

3. Calculate the time it took to return: - Time on Return Trip = Distance to Neighboring City / Speed on Return Trip

4. Calculate the total travel time: - Total Travel Time = 4 hours + Time on Return Trip

Calculation:

1. Calculate the distance to the neighboring city: - Distance to Neighboring City = 55 km/h × 4 hours = 220 km

2. Calculate the speed on the return trip: - Speed on Return Trip = 55 km/h + 5 km/h = 60 km/h

3. Calculate the time it took to return: - Time on Return Trip = Distance to Neighboring City / Speed on Return Trip = 220 km / 60 km/h = 3.67 hours

4. Calculate the total travel time: - Total Travel Time = 4 hours + Time on Return Trip = 4 hours + 3.67 hours = 7.67 hours

Therefore, the total travel time for the trip to the neighboring city and back is approximately 7.67 hours.