Question

Машина и автобус выехали с автостанции. одновременно в противоположных направлениях. скорость автобуса в два раза меньше скорости автомобиля. через сколько часов расстояние между ними будет 450 км. если скорость автомобиля 60 км\ч

Answer 1

Вот так решается эта задачка

Answer 2

Problem Analysis

We are given that a car and a bus leave a bus station simultaneously in opposite directions. The speed of the bus is half the speed of the car, and we need to determine the time it takes for the distance between them to be 450 km. The speed of the car is given as 60 km/h.

Solution

Let's denote the speed of the car as v km/h and the speed of the bus as v/2 km/h. We can use the formula distance = speed × time to solve this problem.

Let's assume that the time it takes for the distance between the car and the bus to be 450 km is t hours.

The distance traveled by the car in t hours is 60t km, and the distance traveled by the bus in t hours is (v/2)t km.

According to the problem, the sum of these distances should be equal to 450 km:

60t + (v/2)t = 450

Simplifying the equation:

60t + (v/2)t = 450

t(60 + v/2) = 450

t = 450 / (60 + v/2)

Now we can substitute the given value of v = 60 km/h into the equation:

t = 450 / (60 + 60/2)

t = 450 / (60 + 30)

t = 450 / 90

t = 5 hours

Therefore, it will take 5 hours for the distance between the car and the bus to be 450 km.

Answer

It will take 5 hours for the distance between the car and the bus to be 450 km.