Question

Из двух городов,расстояние между которыми 5250км,вылетели в 8ч утра навстречу друг другу 2 самолёта.Через 3ч они встретились в пути.Один самолёт летел со скоростью 850км/ч. С какой скоростью летел другой самолёт?

Answer 1

850 км/x * 3 = 2550 км
5250 - 2550 = 2700 км - пролетел второй самолет
2700/3 = 900 км/ч 
Ответ: со скоростью 900 км/ч.

Answer 2

5250-(850*3):3=900(км/ч)
Ответ: 900км/ч.

Answer 3

Problem Analysis

We have two airplanes flying towards each other from two different cities. The distance between the cities is 5250 km. One airplane is flying at a speed of 850 km/h. We need to find the speed of the other airplane.

Solution

Let's assume the speed of the second airplane is x km/h.

We know that the total distance traveled by both airplanes is 5250 km. Since they meet after 3 hours, we can calculate the distance traveled by each airplane using the formula:

Distance = Speed × Time

For the first airplane: Distance1 = 850 km/h × 3 h

For the second airplane: Distance2 = x km/h × 3 h

Since the total distance traveled by both airplanes is 5250 km, we can write the equation:

Distance1 + Distance2 = 5250 km

Substituting the values, we get:

850 km/h × 3 h + x km/h × 3 h = 5250 km

Simplifying the equation, we have:

2550 km/h + 3x km/h = 5250 km

Combining like terms, we get:

3x km/h = 5250 km - 2550 km

3x km/h = 2700 km

Dividing both sides by 3, we find:

x km/h = 2700 km / 3

x km/h = 900 km/h

Therefore, the speed of the second airplane is 900 km/h.

Answer

The second airplane was flying at a speed of 900 km/h.