Question

самолёт пролетел 2500 км за 3ч. в первый час он пролетел 2 5 дробей всего пути, а во второй час 30% всего пути. какое расстояние пролетел за три часа

Answer 1

2 500:5х2=1000 км пролетел за 1-й час

2500=100%, тогда:

2500:100х30=750 км пролетел во 2-й час

750+1000=1750 км за два часа

2500-1750=750 км за третий час

 

 

Answer 2

За первый час он пролетел
1) 2500:5*2=1000км. ,
что составило:
2) 1000:2500*100=40%
Тогда за третий час он пролетел
3) 100%-40%-30%=30%
то есть:
4) 2500:100*30=750 км.

Answer 3

Calculation of the Distance Traveled

To calculate the distance traveled in three hours, we need to determine the distance traveled in each hour and then sum them up.

According to the given information: - In the first hour, the plane traveled 2/5 of the total distance. - In the second hour, the plane traveled 30% of the total distance.

Let's calculate the distance traveled in each hour:

1. Distance traveled in the first hour: - The plane traveled 2/5 of the total distance. - Let's assume the total distance is x kilometers. - Therefore, the distance traveled in the first hour is (2/5)x kilometers.

2. Distance traveled in the second hour: - The plane traveled 30% of the total distance. - Let's calculate 30% of the total distance: - 30% of x kilometers is 0.3x kilometers. - Therefore, the distance traveled in the second hour is 0.3x kilometers.

Now, let's calculate the total distance traveled in three hours:

1. Distance traveled in the first hour: (2/5)x kilometers. 2. Distance traveled in the second hour: 0.3x kilometers. 3. Distance traveled in the third hour: The remaining distance after the first two hours. - The remaining distance is the total distance minus the distance traveled in the first two hours. - The total distance is given as 2500 km. - Therefore, the distance traveled in the third hour is 2500 km - [(2/5)x + 0.3x] km.

To find the total distance traveled in three hours, we sum up the distances traveled in each hour:

Total distance traveled = Distance traveled in the first hour + Distance traveled in the second hour + Distance traveled in the third hour

Let's calculate the total distance traveled:

Total distance traveled = (2/5)x + 0.3x + [2500 km - (2/5)x - 0.3x] km

Simplifying the equation:

Total distance traveled = (2/5)x + 0.3x + 2500 km - (2/5)x - 0.3x

Combining like terms:

Total distance traveled = 2500 km

Therefore, the plane traveled a total distance of 2500 km in three hours.

Note: The given search results did not provide specific information to directly cite for this calculation. However, the calculation is based on basic mathematical principles and the given information.