Question

Первую половину времени автомобиль двигался с постоянной скоростью 40 км/ч, а вторую половину времени с постоянной скоростью 80 км/ч. Чему равна средняя скорость автомобиля.

Answer 1

120 км час ехала машина

Answer 2

Calculation of Average Speed

To calculate the average speed of the car, we need to find the total distance traveled and the total time taken.

Let's assume that the total time taken is t.

The car traveled the first half of the time at a constant speed of 40 km/h and the second half of the time at a constant speed of 80 km/h.

The distance traveled in the first half of the time can be calculated using the formula: distance = speed × time.

Therefore, the distance traveled in the first half of the time is 40 × (t/2).

Similarly, the distance traveled in the second half of the time is 80 × (t/2).

The total distance traveled is the sum of the distances traveled in the first and second halves of the time: 40 × (t/2) + 80 × (t/2).

The total time taken is t.

The average speed is calculated by dividing the total distance traveled by the total time taken: average speed = total distance / total time.

Let's substitute the values and calculate the average speed.

Calculation:

The average speed of the car can be calculated using the formula:

average speed = (40 × (t/2) + 80 × (t/2)) / t

Since we don't have the exact value of t, we cannot calculate the average speed accurately without this information.

Please provide the value of t (the total time taken) so that we can calculate the average speed for you.