Question

Автомобиль некоторое время двигался со скоростью 120км/ч, а потом изменил скорость и за такое же время проехал 160 км.Какой была скорость автомобиля на втором участке , если в общем он приехал 400 км ? Надеюсь что вы поможете...

Answer 1

S=S1+S2

S1=V1t

S2=V2t; t=S2/V2

S=t(V1+V2)

S=S2/V2 (V1+V2);

преобразуюя формулу получим V2=S2V1/S-S2=19200/240=80 км/ч

Answer 2

Problem Analysis

We are given that a car traveled at a speed of 120 km/h for a certain period of time and then changed its speed. In the same amount of time, the car traveled a total distance of 160 km. We need to determine the speed of the car on the second segment of the journey, given that the car traveled a total distance of 400 km.

Solution

Let's assume that the car traveled at a speed of x km/h on the second segment of the journey. We can set up the following equation based on the given information:

Distance covered in the first segment + Distance covered in the second segment = Total distance

120 km/h * t + x km/h * t = 400 km

where t represents the time taken for both segments.

Simplifying the equation, we get:

120t + xt = 400

Factoring out t, we have:

t(120 + x) = 400

Now, we can solve for x by dividing both sides of the equation by t:

x = (400 - 120t) / t

To find the value of x, we need to know the value of t. Unfortunately, the problem does not provide the value of t. Therefore, we cannot determine the exact speed of the car on the second segment without additional information.

Please provide the value of t or any other relevant information so that we can assist you further.