Question

Из двух городов одновременно навстречу друг другу выехали два автомобиля.Скорость одного из них равна 60км/ч,что составляет 12/13 скорости второго.Через сколько часов после начала движения они встретятся,если расстояние между городами равно 375км?

Answer 1

1) скорость 1-го автомобиля - 60 км/ч;
2) 1/13 его скорости составляет:
60 : 12 = 5 (км/ч);
3) скорость 2-го автомобиля составляет:
5 х 13 = 65 (км/ч);
4) время в пути равно:
375 : (60 + 65) = 375 : 125 = 3 (ч).

Answer 2

60:12*13=65(км/ч) скорость 2 автомобиля
60+65=125 (км/ч) общая скорость
375:125=3 часа 
ответ: через 3 часа

Answer 3

Problem Analysis

We have two cars traveling towards each other from two different cities. The speed of one car is given as 60 km/h, which is 12/13 of the speed of the second car. We need to find out how many hours it will take for them to meet if the distance between the cities is 375 km.

Solution

Let's assume the speed of the second car is x km/h. According to the problem, the speed of the first car is 60 km/h, which is 12/13 of the speed of the second car. We can set up the following equation:

60 = (12/13) * x

To find the value of x, we can solve this equation.

Calculation

To solve the equation, we can multiply both sides by 13/12 to isolate x:

60 * (13/12) = x

Simplifying the equation:

x = 65 km/h

Now that we know the speed of the second car, we can calculate the time it will take for them to meet. We can use the formula:

time = distance / relative speed

The relative speed is the sum of the speeds of both cars:

relative speed = 60 km/h + 65 km/h = 125 km/h

Substituting the values into the formula:

time = 375 km / 125 km/h = 3 hours

Therefore, it will take 3 hours for the two cars to meet.

Answer

After 3 hours of starting their journey, the two cars will meet.