Question

Из города до села автобус едет 1,8 ч , а легковая автомашина 0,8. Найдите скорость автобуса , если известно , что она меньше скорости легковой автомашины на 50 км/ч.

Answer 1

Пусть скорость автобуса х, тогда скорость машины х+50
Автобус едет 1.8х км, машина едет 0.8 (х+50) км, расстояние одинаковое, значит
1.8х=0.8 (х+50)
1.8х=0.8х+40
1.8х-0.8х=40
х=40 км/ч скорость автобуса
Ответ: 40

Answer 2

1.8x=0.8y
x-50=y
1.8x=0.8(x-50)
1.8x=0.8x-40
1.8x-0.8x=40
x=40

Answer 3

Calculation of Bus Speed

To find the speed of the bus, we need to determine the distance traveled by both the bus and the car in their respective travel times.

Let's assume that the speed of the car is x km/h. According to the given information, the car takes 0.8 hours to travel from the city to the village.

Therefore, the distance traveled by the car can be calculated as follows: Distance = Speed × Time Distance = x km/h × 0.8 h

Similarly, the bus takes 1.8 hours to travel from the city to the village. Let's assume the speed of the bus is y km/h.

Therefore, the distance traveled by the bus can be calculated as follows: Distance = Speed × Time Distance = y km/h × 1.8 h

According to the given information, the speed of the bus is 50 km/h less than the speed of the car. So we can write the equation as: y = x - 50

Now, let's substitute the values and solve the equations to find the speed of the bus.

Solution:

From the equation Distance = Speed × Time, we can calculate the distance traveled by the car and the bus.

The distance traveled by the car is 0.8x km.

The distance traveled by the bus is 1.8y km.

Since the distance traveled by the car and the bus is the same (from the city to the village), we can equate the two distances:

0.8x = 1.8y

Now, substitute y = x - 50 into the equation:

0.8x = 1.8(x - 50)

Simplifying the equation:

0.8x = 1.8x - 90

0.8x - 1.8x = -90

-1x = -90

x = 90

Therefore, the speed of the car is 90 km/h.

Now, substitute the value of x into the equation y = x - 50 to find the speed of the bus:

y = 90 - 50

y = 40

Therefore, the speed of the bus is 40 km/h.

Answer:

The speed of the bus is 40 km/h.

Please note that the above calculations are based on the given information and assumptions made.