Question

Вертоліт і літак вилетіли одночасно в протилежних напрямках із різних аеропортів . Відстань між якими дорівнює 350 км. Швидкість руху вертоліт а становить 150 км/год , а літака 200 км. Через скільки годин відстань буде між ними через 1400 км?

Answer 1

1) 150 + 200 = 350 км/ч - скорость удаления
2) 1400 - 350 = 1050 км - должны пролететь, чтобы между ними расстояние было 1400 км (1400 км - включая изначальное расстояние 350 км между аэропортами)
3) 1050 : 350 = 3 ч - через столько расстояние между ними будет 1400 км

Answer 2

Problem Analysis

We have a helicopter and an airplane flying simultaneously in opposite directions from different airports. The distance between the airports is 350 km. The helicopter's speed is 150 km/h, and the airplane's speed is 200 km/h. We need to determine how many hours it will take for the distance between them to be 1400 km.

Solution

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

Let's assume that the time it takes for the distance between them to be 1400 km is t hours.

The helicopter is flying at a speed of 150 km/h, so the distance it covers in t hours is 150t km.

The airplane is flying at a speed of 200 km/h, so the distance it covers in t hours is 200t km.

Since they are flying in opposite directions, the total distance between them is the sum of the distances covered by the helicopter and the airplane:

distance between them = distance covered by helicopter + distance covered by airplane

Substituting the values we have:

1400 km = 150t km + 200t km

Simplifying the equation:

1400 km = 350t km

Now, we can solve for t:

t = 1400 km / 350 km

t = 4 hours

Therefore, it will take 4 hours for the distance between the helicopter and the airplane to be 1400 km.

Answer

The distance between the helicopter and the airplane will be 1400 km after 4 hours.