Question

Пожалуйста помогите решить задачу!!!Самолет летел из Москвы в Иркутск. Сначала он летел 3ч со скоростью 620 км/ч ,затем несколько часов со скоростью 600км/ч,а в конце пути 4ч со скоростью 493км/ч Сколько часов затратил самолет на весь перелет,если расстояние от Москвы до Иркутска 5032 км?

Answer 1

Найдем протяженность первого участка пути
620*3=1860 км
найдем протяженность конечного участка
493*4=1972 км
найдем протяженность второго участка
5032-1860-1972=1200 км
найдем время полета на втором участке
1200:600=2 ч
найдем продолжительность всего пути
3+4+2=9 ч

Answer 2

Problem Analysis

To solve this problem, we need to calculate the total time taken by the plane for the entire flight from Moscow to Irkutsk. We are given the speeds of the plane during different segments of the flight and the total distance between the two cities.

Solution

To find the total time taken by the plane, we can divide the total distance by the average speed of the plane. The average speed can be calculated by taking the weighted average of the speeds during different segments of the flight.

Let's calculate the total time taken step by step:

1. Calculate the time taken for the first segment of the flight: - Speed: 620 km/h - Time: 3 hours - Distance covered: Speed * Time = 620 km/h * 3 hours = 1860 km

2. Calculate the time taken for the second segment of the flight: - Speed: 600 km/h - Time: unknown - Distance covered: unknown

3. Calculate the time taken for the third segment of the flight: - Speed: 493 km/h - Time: 4 hours - Distance covered: Speed * Time = 493 km/h * 4 hours = 1972 km

4. Calculate the distance covered during the second segment of the flight: - Total distance - Distance covered during the first and third segments: - Distance covered during the second segment = Total distance - (1860 km + 1972 km)

5. Calculate the time taken for the second segment of the flight: - Speed: 600 km/h - Distance covered: calculated in step 4 - Time: Distance covered / Speed

6. Calculate the total time taken for the entire flight: - Total time = Time taken for the first segment + Time taken for the second segment + Time taken for the third segment

Let's calculate the values:

1. Time taken for the first segment: 3 hours 2. Distance covered during the second segment: 5032 km - (1860 km + 1972 km) = 1196 km 3. Time taken for the second segment: 1196 km / 600 km/h = 1.993 hours (approximately) 4. Time taken for the third segment: 4 hours 5. Total time taken for the entire flight: 3 hours + 1.993 hours + 4 hours = 8.993 hours (approximately)

Therefore, the plane took approximately 8.993 hours for the entire flight from Moscow to Irkutsk.

Answer

The plane took approximately 8.993 hours for the entire flight from Moscow to Irkutsk.

Note: The calculations provided are approximate due to rounding.