Question

Из Москвы в Иркутск вылетел вертолет через 16 часа вслед за ним вылетел самолет со скоростью 840 километров час Найдите скорость вертолета если известно что в аэропорт Иркутск они прибыли одновременно расстояние от Москвы до Иркутска равно 4200 километров

Answer 1

4200/840=100/20=5 часов летел второй самолет
Время первого тогда 5+16 = 21
4200/21=200 км/ч

Answer 2

4200 км:840 км/час=5 час (время полета самолета) (t=S:V)
5 час+16 час=21 час (время полета вертолета)
4200 км:21 час=200 км/час (скорость вертолета) (V=S:t)
Ответ: скорость вертолета - 200 км/час

Answer 3

Problem Analysis

We are given the following information: - A helicopter departed from Moscow to Irkutsk 16 hours before a plane. - The plane flew at a speed of 840 kilometers per hour. - The distance from Moscow to Irkutsk is 4200 kilometers. - The helicopter and the plane arrived at the Irkutsk airport simultaneously.

We need to find the speed of the helicopter.

Solution

Let's assume the speed of the helicopter is v kilometers per hour.

We can calculate the time it took for the helicopter to travel from Moscow to Irkutsk using the formula:

Time = Distance / Speed

For the helicopter, the time is 16 hours less than the time it took for the plane to travel the same distance. Therefore, the time for the helicopter is:

Time for helicopter = Time for plane - 16 hours

We can substitute the values into the equation:

4200 / v = 4200 / 840 - 16

Simplifying the equation:

4200 / v = 5 - 16

4200 / v = -11

To solve for v, we can cross-multiply:

4200 = -11v

Dividing both sides by -11:

v = -4200 / 11

Calculating the value:

v ≈ -381.82

Since speed cannot be negative, we can conclude that the speed of the helicopter is approximately 381.82 kilometers per hour.

Answer

The speed of the helicopter is approximately 381.82 kilometers per hour.