Question

Из Москвы в Иркутск вылетел вертолет через 16 часа вслед за ним вылетел самолет со скоростью 840 км\час Вычисли скорость вертолета если известно что в аэропорт Иркутска они прибыли одновременно расстояние от Москвы до Иркутска равно 4 200км

Answer 1

4200 : 840= 5 (ч) -летел самолёт.
16 + 5 = 21 (ч)- летел вертолёт.
4200 : 21 = 200 (км/ч) - ответ.

Answer 2

Calculation of Helicopter Speed

To calculate the speed of the helicopter, we can use the formula:

Speed = Distance / Time

Given that the distance from Moscow to Irkutsk is 4,200 km and the helicopter took off 16 hours before the plane, we can calculate the speed of the helicopter.

Let's calculate the time it took for the plane to reach Irkutsk:

Time taken by the plane = Distance / Speed

The speed of the plane is given as 840 km/h, and the distance is 4,200 km. Plugging in these values, we can calculate the time taken by the plane:

Time taken by the plane = 4,200 km / 840 km/h = 5 hours

Since the helicopter and the plane arrived in Irkutsk simultaneously, we can subtract the time taken by the plane from the total time to find the time taken by the helicopter:

Time taken by the helicopter = Total time - Time taken by the plane = 16 hours - 5 hours = 11 hours

Now, we can calculate the speed of the helicopter using the time taken by the helicopter and the distance:

Speed of the helicopter = Distance / Time taken by the helicopter = 4,200 km / 11 hours = 381.82 km/h

Therefore, the speed of the helicopter is approximately 381.82 km/h.