Question

В одно и тоже время с одного пункта выехала машина 90км/ч и автобус ?км/ч через 3 часа они встретились. сколько будет скорость автобуса если они проехали 60 км​

Answer 1

Пошаговое объяснение:

1) 60*3=180(км) - проехал автобус

2) 90*3=270(км) - проехал автомобиль

Answer 2

(1) 60•3=180 (км) проехал автобус

(2)90•3=270 (км) проехала машина

Answer 3

Problem Analysis

We are given that a car and a bus started from the same point. The car was traveling at a speed of 90 km/h, and after 3 hours, they met. We need to find the speed of the bus if they traveled a distance of 60 km.

Solution

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

We know that the distance traveled by an object is equal to its speed multiplied by the time taken. Therefore, the distance traveled by the car is 90 km/h * 3 hours = 270 km.

Since the car and the bus met after 3 hours, the total distance traveled by both the car and the bus is 270 km.

Let's denote the time taken by the bus as t hours.

The distance traveled by the bus is x km/h * t hours.

According to the problem, the total distance traveled by both the car and the bus is 270 km. Therefore, we can write the equation:

270 km = 60 km + x km/h * t hours

Simplifying the equation, we get:

x km/h * t hours = 270 km - 60 km

x km/h * t hours = 210 km

Now, we need to find the value of x when the distance traveled by the bus is 60 km. We can substitute this value into the equation:

x km/h * t hours = 210 km

x km/h * t hours = 60 km

Dividing both sides of the equation by t hours, we get:

x km/h = 60 km / t hours

Therefore, the speed of the bus is 60 km / t hours.

To find the value of t, we can use the fact that the bus traveled a distance of 60 km. We can set up another equation:

x km/h * t hours = 60 km

Substituting the value of x km/h from the previous equation, we get:

(60 km / t hours) * t hours = 60 km

Simplifying the equation, we get:

60 km = 60 km

This equation is true for any value of t. Therefore, the speed of the bus can be any value.

In conclusion, the speed of the bus can be any value, as long as it allows the bus to travel a distance of 60 km in the given time.

Answer

The speed of the bus can be any value that allows it to travel a distance of 60 km in the given time.