Question

два автомобиля одновременно выехали в противоположных направлениях. Через 3 часа расстояние между ними стало 540 км. Найди скорость первого автомобиля, если скорость второго автомобиля 80 км/ч

Answer 1

Ответ:100 км/ч

Пошаговое объяснение:

1)80·3=240(км)-проехал второй автомобиль;

2)540–240=300 (км)-проехал первый автомобиль;

3)300:3=100 (км/ч)-скорость первого автомобиля.

Answer 2

Problem Statement

Two cars simultaneously set off in opposite directions. After 3 hours, the distance between them is 540 km. The speed of the second car is 80 km/h. We need to find the speed of the first car.

Solution

To find the speed of the first car, we can use the formula:

Distance = Speed x Time

Let's assume the speed of the first car is v1 km/h.

After 3 hours, the distance traveled by the first car is 3v1 km, and the distance traveled by the second car is 3 x 80 = 240 km.

The sum of the distances traveled by both cars is equal to the total distance between them, which is 540 km.

So, we can write the equation:

3v1 + 240 = 540

Simplifying the equation:

3v1 = 540 - 240

3v1 = 300

Dividing both sides of the equation by 3:

v1 = 100

Therefore, the speed of the first car is 100 km/h.