Question

Из пункта А одновременно в противоположных направлениях выехали два автомобиля.Скорость одного автомобиля 75км.ч.Найдите скорость второго автомобиля,если через 5 часов расстояние между ними стало 860км?

Answer 1

V1=75кмч t1=5 часов S1=? v2=? t2=5 часов S2=? S1+s2=s S=860 км 860-(75×5)=485км 485:5=97 кмч Ответ:97 км/с

Answer 2

Problem Analysis

We are given that two cars start from point A simultaneously in opposite directions. The speed of one car is 75 km/h. After 5 hours, the distance between the two cars is 860 km. 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 distance covered by the first car in 5 hours is 75 km/h * 5 h = 375 km.

The distance covered by the second car in 5 hours is x km/h * 5 h = 5x km.

Since the two cars are moving in opposite directions, the total distance between them after 5 hours is the sum of the distances covered by each car:

375 km + 5x km = 860 km.

To find the speed of the second car, we can solve this equation for x.

375 km + 5x km = 860 km

Subtracting 375 km from both sides:

5x km = 860 km - 375 km

Simplifying:

5x km = 485 km

Dividing both sides by 5:

x km = 485 km / 5

Calculating:

x = 97 km/h

Therefore, the speed of the second car is 97 km/h.

Answer

The speed of the second car is 97 km/h.