Question

Из двух городов, расстояние между которыми равно 540 км, навстречу друг другу одновременно выехали два автомобиля. Найдите скорость второго автомобиля, если скорость первого равна 70 км/ч и автомобили встретились через 4 часа после выезда.

Answer 1

1)540:4=135км\ч-скорость сближения.
2)135-70=65км\ч-скорость второго авто.

Answer 2

65 км/ч т.к. 70·4=280 540-280=260 260:4=65

Answer 3

Problem Analysis

We are given that two cars start simultaneously from two cities that are 540 km apart. The first car has a speed of 70 km/h, and the cars meet after 4 hours. We need to find the speed of the second car.

Solution

Let's assume the speed of the second car is x km/h.

We can use the formula: distance = speed × time to find the distance traveled by each car.

For the first car: - Speed = 70 km/h - Time = 4 hours - Distance = 70 km/h × 4 hours = 280 km

For the second car: - Speed = x km/h - Time = 4 hours - Distance = x km/h × 4 hours = 4x km

Since the total distance between the two cars is 540 km, we can set up the equation:

280 km + 4x km = 540 km

Simplifying the equation:

4x km = 540 km - 280 km 4x km = 260 km

Dividing both sides of the equation by 4:

x km = 260 km / 4 x km = 65 km/h

Therefore, the speed of the second car is 65 km/h.

Answer

The speed of the second car is 65 km/h.