Question

От автобусной станции отошел автобус со скоростью 80 километров час через час противоположные направления, с этой же станции вышел 2 автобус скорость которого 60 километров час через какое время после своего выхода автобуса будет находиться на расстоянии 500 км от первого

Answer 1

Х ч время которое пройдут автобусы после старта второго, тогда 80х+60х+80=500, х=3ч, а первый автобус 3+1. =4ч

Answer 2

Problem Analysis

We are given the information that a bus departs from a bus station with a speed of 80 kilometers per hour. After one hour, another bus departs from the same station in the opposite direction with a speed of 60 kilometers per hour. We need to determine how long it will take for the second bus to be 500 kilometers away from the first bus.

Solution

To solve this problem, we can use the formula: distance = speed × time.

Let's assume that it takes the second bus t hours to be 500 kilometers away from the first bus.

The distance covered by the first bus in t hours can be calculated as 80 × (t + 1) (since the first bus departs one hour earlier).

The distance covered by the second bus in t hours can be calculated as 60 × t.

According to the problem, the sum of these distances should be equal to 500 kilometers:

80 × (t + 1) + 60 × t = 500

Now, let's solve this equation to find the value of t.

80t + 80 + 60t = 500

140t + 80 = 500

140t = 420

t = 420 / 140

t = 3

Therefore, it will take the second bus 3 hours after its departure to be 500 kilometers away from the first bus.

Answer

After its departure, the second bus will be 500 kilometers away from the first bus after 3 hours.