Question

Из двух портовых городов, расстояние между которыми 660 км, одновременно навстречу друг другу выехали два автомобиля. Через 4 часа они встретились. Скорость одного - 90 км/ч. Какова скорость второго автомобиля? (ЗАПИШИТЕ В ВИДЕ УРАВНЕНИЯ)

Answer 1

Пусть x это скорость второго автомобиля тогда x + 90 - скорость сближения
660:4=x + 90
190=x+90
x=190-90
x=100
Нажми спасибо мне будет приятно))

Answer 2

Problem Analysis

We have two cars that start from two port cities and travel towards each other. The distance between the cities is 660 km. One car has a speed of 90 km/h, and we need to find the speed of the second car.

Solution

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

The time taken by the first car to meet the second car is 4 hours.

Using the formula distance = speed × time, we can calculate the distance traveled by each car.

For the first car: distance = speed × time = 90 km/h × 4 h = 360 km

For the second car: distance = speed × time = x km/h × 4 h = 4x km

Since the total distance between the two cars is 660 km, we can write the equation:

360 km + 4x km = 660 km

Simplifying the equation, we get:

4x km = 660 km - 360 km 4x km = 300 km

Dividing both sides of the equation by 4, we find:

x km = 300 km / 4 x km = 75 km/h

Therefore, the speed of the second car is 75 km/h.

Answer

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