Question

Расстояние от города А до Б 610км. из города А в пункт Б выехал первый автомобиль через 2 часа после отправления из пункта Б в пункт А выехал второй автомобиль со скоросью 75 км.ч Найти скорость первого автомобиля,если известно что они встретились на расстоянии 330км от города А.

Answer 1

Сегодня попалась она же. ответ 55

Answer 2

Problem Analysis

We are given the following information: - The distance from city A to city B is 610 km. - The first car left city A and the second car left city B 2 hours later. - The second car traveled at a speed of 75 km/h. - The two cars met at a distance of 330 km from city A.

We need to find the speed of the first car.

Solution

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

The time taken by the first car to travel the distance from city A to the meeting point is given by: time = distance / speed.

The time taken by the second car to travel the distance from the meeting point to city A is also given by: time = distance / speed.

Since the two cars met at a distance of 330 km from city A, we can set up the following equation: (610 - 330) / x = 330 / 75.

Let's solve this equation to find the value of x.

Calculation

(610 - 330) / x = 330 / 75.

Simplifying the equation: 280 / x = 330 / 75.

Cross-multiplying: 280 * 75 = 330 * x.

Simplifying further: 21000 = 330 * x.

Dividing both sides by 330: x = 21000 / 330.

Calculating the value of x: x = 63.636.

Answer

The speed of the first car is approximately 63.636 km/h.

Please note that the answer is rounded to three decimal places.