Question

Помогите!!! Первую треть пути автомобиль движется со скоростью 55 км/ч, вторую треть — со скоростью 89 км/ч. Определить, с какой скоростью он двигался оставшийся путь, если средняя скорость на всем пути равна 76 км/ч.

Answer 1

Ответ:

Объяснение:

76*3=228 км/ч

228-(89+55)=84 км/ч

Answer 2

Calculating the Remaining Speed

To calculate the speed at which the car traveled the remaining distance, we can use the formula for average speed:

Average Speed = Total Distance / Total Time

We know the average speed and the speeds for the first and second thirds of the journey. Let's denote the total distance as D, the speed for the first third as V1, the speed for the second third as V2, and the speed for the remaining distance as V3.

We can express the total distance in terms of the speeds and times for each third of the journey:

D = (V1 * T1) + (V2 * T2) + (V3 * T3)

Where T1, T2, and T3 are the times taken to cover the first third, second third, and remaining distance, respectively.

We also know that:

T1 = D1 / V1 T2 = D2 / V2 T3 = D3 / V3

Where D1, D2, and D3 are the distances for the first third, second third, and remaining distance, respectively.

We can use these equations to solve for V3.

Solution

Given: - Speed for the first third, V1 = 55 km/h - Speed for the second third, V2 = 89 km/h - Average speed, Average Speed = 76 km/h

We can use the formula for average speed to find the total distance: Average Speed = Total Distance / Total Time

Using the given speeds and the average speed, we can calculate the speed for the remaining distance.