Question

Из пункта А в пункт в автомобиль доехал за 4 часа. На обратную дорогу было затрачено 6 ч. Найдите скорость автомобиля из пункта А в пункт В, если обратно он ехал на 30 км/ч медленней. пожалуйста, помогите ​

Answer 1

Объяснение:

Пусть скорость автомобиля из пункта А в пункт В

равна х км/ч.         ⇒    

Скорость автомобиля из пункта В в пункт А

равна (х-30) км/ч.

4*х=6*(х-30)

4х=6х-180

2х=180 |:2

x=90 (км/ч).

Ответ:  скорость автомобиля из пункта А в пункт В

равна 90 км/ч.        

 

Answer 2

$4*x=(x-30)* 6\\4x=6x-180\\2x=180 :2\\x=90 .\\Otvet : 90$

Answer 3

Calculation of the Car's Speed

To find the speed of the car from point A to point B, we can use the formula:

Speed = Distance / Time

Let's assume the distance between point A and point B is D.

On the way from point A to point B, the car took 4 hours to travel the distance. Therefore, the speed from point A to point B can be calculated as:

Speed from A to B = D / 4 On the return journey from point B to point A, the car took 6 hours to travel the same distance. However, it was traveling 30 km/h slower than on the way from point A to point B. Therefore, the speed from point B to point A can be calculated as:

Speed from B to A = D / 6 Speed from B to A = (Speed from A to B) - 30 Now we can solve these equations to find the speed from point A to point B.

D / 6 = (D / 4) - 30

Multiplying both sides of the equation by 12 to eliminate the denominators:

2D = 3D - 360

Rearranging the equation:

D = 360

Therefore, the distance between point A and point B is 360 km.

Substituting this value back into the equation for the speed from A to B:

Speed from A to B = 360 / 4 = 90 km/h

So, the speed of the car from point A to point B is 90 km/h.

Please let me know if there's anything else I can help you with!