Question

Атобуз за 4 часа проходит растояние на 3 км меньше чем автомобиль за 3 ч найдите скорость автобуса если она на 17км/ ч меньше скорости авто

Answer 1

Пусть х - скорость автомобиля, тогда скорость автобуса х - 17. Уравнение:
3 * х - 4 * (х - 17) = 3
3х - 4х + 68 = 3
- х = 3 - 68
- х = - 65
х = 65 (км/ч) - скорость автомобиля
65 - 17 = 48 (км/ч) - скорость автобуса
Проверка: 4 * 48 = 192 (км) - проедет автобус за 4 часа
                  3 * 65 = 195 (км) - проедет автомобиль за 3 часа
                  195 - 192 = 3 (км) - на 3 км меньше проедет автобус
Ответ: 48 км/ч.
                  

Answer 2

Problem Analysis

We are given that a bus covers a distance in 4 hours that is 3 km less than the distance covered by a car in 3 hours. We need to find the speed of the bus if it is 17 km/h slower than the speed of the car.

Solution

Let's assume the speed of the car is x km/h. According to the problem, the speed of the bus is 17 km/h slower than the speed of the car, so the speed of the bus is (x - 17) km/h.

We can use the formula speed = distance / time to find the distance covered by the car and the bus.

The distance covered by the car in 3 hours is 3x km, and the distance covered by the bus in 4 hours is 4(x - 17) km.

Since the distance covered by the bus is 3 km less than the distance covered by the car, we can set up the following equation:

4(x - 17) = 3x - 3

Now, let's solve this equation to find the value of x.

Calculation

Expanding the equation:

4x - 68 = 3x - 3

Moving all the terms with x to one side:

4x - 3x = 68 - 3

Simplifying:

x = 65

Answer

The speed of the car is 65 km/h. Since the speed of the bus is 17 km/h slower, the speed of the bus is (65 - 17) = 48 km/h.

Therefore, the speed of the bus is 48 km/h.