Question

СРОЧНО!!!Автомобіль рухався 3 год зі швидкістю 120 км/год i 2 год зі швидкістю 50 км/год і 4 год зі швидкістю 80 км/год. потім.Проїхав ще 300 км зі швидкістю 50 км/год. Знайдіть середню швидкість руху автомобіля.​

Answer 1

Ответ:

(120×3+50×2+80×4+300)÷15=72 км/год

Answer 2

Calculation of Average Speed

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

Given information: - The car traveled for 3 hours at a speed of 120 km/h. - The car traveled for 2 hours at a speed of 50 km/h. - The car traveled for 4 hours at a speed of 80 km/h. - The car traveled an additional 300 km at a speed of 50 km/h.

Let's calculate the total distance traveled and the total time taken:

1. Distance traveled at 120 km/h for 3 hours: 120 km/h * 3 hours = 360 km 2. Distance traveled at 50 km/h for 2 hours: 50 km/h * 2 hours = 100 km 3. Distance traveled at 80 km/h for 4 hours: 80 km/h * 4 hours = 320 km 4. Additional distance traveled at 50 km/h for 300 km: 300 km

Total distance traveled = 360 km + 100 km + 320 km + 300 km = 1080 km

Total time taken = 3 hours + 2 hours + 4 hours = 9 hours

Now, we can calculate the average speed using the formula:

Average Speed = Total Distance / Total Time

Average Speed = 1080 km / 9 hours = 120 km/h.

Therefore, the average speed of the car is 120 km/h.