Question

Из двух городов, расстояние между которыми равно 556 км, одновременно выехали навстречу друг другу два автомобиля и встретились через 4 часа после начала движения. Скорость одного автомобиля равна 64 км час Найдите скорость второго автомобиля.

Answer 1

1) 556 : 4 = 139 км/ч скорость сближения
2) 139 - 64 = 75 км/ч скорость второго автомобиля

Answer 2

Problem Analysis

To solve this problem, we can use the formula:

distance = speed * time

We know the distance between the two cities is 556 km, and the two cars meet after 4 hours. One car's speed is 64 km/h. We need to find the speed of the second car.

Calculating the Speed of the Second Car

Using the formula distance = speed * time, we can calculate the speed of the second car.

Let's denote: - Speed of the first car as s1 (given as 64 km/h) - Speed of the second car as s2 - Time taken to meet as 4 hours

We can use the formula to find the speed of the second car: 556 = (s1 + s2) * 4

Solving for the Speed of the Second Car

We can solve the equation for the speed of the second car, s2.

556 = (64 + s2) * 4

556 = 256 + 4s2

4s2 = 556 - 256

4s2 = 300

s2 = 300 / 4

s2 = 75 km/h

Answer

The speed of the second car is 75 km/h.