Question

Пожалуйста очень срочно нужно помогите)автомобиль проехал первый участок пути со скоростью 100 км/ч , а второй со скоростью 40км/ч причем на прохождения каждаго из участков ему понадобилось одинаковое время .Кокова средняя скорость на всем пути

Answer 1

<V>=S/t=(S1+S2)/(t1+t2)=(100t+40t)/2t=140t/2t=70 км/ч

Answer 2

Calculation of Average Speed

To calculate the average speed for the entire journey, we need to find the total distance traveled and the total time taken.

Let's assume that the first segment of the journey, where the car traveled at a speed of 100 km/h, covered a distance of d1 km. Similarly, the second segment, where the car traveled at a speed of 40 km/h, covered a distance of d2 km.

Since the car took the same amount of time to travel each segment, we can equate the time taken for both segments.

The time taken for the first segment can be calculated as t1 = d1 / 100 hours, and the time taken for the second segment can be calculated as t2 = d2 / 40 hours.

Since the total time taken for both segments is the same, we can equate the two expressions:

t1 = t2

Substituting the expressions for t1 and t2, we get:

d1 / 100 = d2 / 40

Now, we can solve this equation to find the relationship between d1 and d2.

To find the average speed for the entire journey, we need to calculate the total distance traveled, which is the sum of d1 and d2, and the total time taken, which is twice the value of t1 or t2.

Finally, we can calculate the average speed by dividing the total distance by the total time.

Let's perform the calculations to find the average speed.