Question

Скорость вертолета в 5 раз больше скорости автомашины. Вертолет за 2 ч пролетел на 480 км больше, чем машина проехала за это же время.Найти скорость вертолета. (Не уравнением)

Answer 1

-------  км  скорость машины ( 1 часть)
------   ------    ------   ------   -------   км скорость вертолета ( 1 * 5 = 5 частей)
         

48- : 2 = 240 км - на столько скорость вертолета за 1 час больше скорости машины
5 - 1 = 4 части -  на столько скорость вертолета за 1 час больше скорости машины
4 части = 240 км
240 : 4 = 60 км скорость машины ( 1 часть)
60 * 5 = 300 км скорость вертолета ( 5 частей)
Ответ: 300 км

проверка: 300 * 2 = 600 км - вертолет за 2 часа, 60 * 2 = 120 км - машина за 2 часа, 600 - 120 = 480 км - верно

Answer 2

Problem Analysis

We are given that the speed of a helicopter is 5 times greater than the speed of a car. The helicopter traveled 480 km more than the car in a time period of 2 hours. We need to find the speed of the helicopter.

Solution

Let's assume the speed of the car is x km/h. Since the speed of the helicopter is 5 times greater than the speed of the car, the speed of the helicopter is 5x km/h.

We know that distance = speed × time.

The car traveled for 2 hours, so the distance traveled by the car is 2x km.

The helicopter traveled for 2 hours and covered 480 km more than the car, so the distance traveled by the helicopter is 2x + 480 km.

To find the speed of the helicopter, we can divide the distance traveled by the time taken:

Speed of helicopter = (2x + 480) km / 2 hours

Simplifying the equation:

Speed of helicopter = x + 240 km/h

Therefore, the speed of the helicopter is x + 240 km/h.

Answer

The speed of the helicopter is x + 240 km/h, where x is the speed of the car.

Note: Since we don't have the specific speed of the car, we cannot calculate the exact speed of the helicopter. We can only express it in terms of the speed of the car.