Question

Автомабилист до соседнего города ехал 4 ч со скоростью 55 км.ч. На обратном пути он увеличел скорость на 5 км.ч. Сколько всего времени длилась поездка в соседней город и обратно? помогите решить задачу

Answer 1

1) 4*55=220 (км) расстояние  до соседнего города
2)55+5=60(км/ч) -скорость на обратном пути
3)220:60=3 ч 40 мин - время затраченное на обратный путь
4) 4ч+3ч 40 мин= 7ч 40мин
Поездка в соседний город и обратно длилась 7 ч 40 мин

Answer 2

Problem Analysis

The problem states that a driver traveled from one city to a neighboring city at a speed of 55 km/h and then returned at a speed that was 5 km/h faster. We need to calculate the total duration of the round trip.

Solution

To solve this problem, we can use the formula: time = distance / speed.

Let's calculate the time it took for the driver to reach the neighboring city and return.

1. Time taken to reach the neighboring city: - Distance = ? - Speed = 55 km/h - Time = Distance / Speed

2. Time taken to return from the neighboring city: - Distance = ? - Speed = 55 km/h + 5 km/h (faster) - Time = Distance / Speed

To find the total duration of the round trip, we need to add the time taken to reach the neighboring city and the time taken to return.

Let's calculate the distances and times for each part of the trip.

Calculation

1. Time taken to reach the neighboring city: - Distance = Speed * Time - Time = 4 hours - Speed = 55 km/h - Distance = 55 km/h * 4 hours = 220 km

2. Time taken to return from the neighboring city: - Distance = Speed * Time - Time = ? - Speed = 55 km/h + 5