Question

Автомобиль и автобус выехали одновременно из двух городов навстречу друг другу.Скорость автомобиля 90ки/ч,автобуса 70км/ч .Через сколько часов они встретится если расстояние между городами 1600 км

Answer 1

1) 90+70=160 (км/ч) Автомобиль и автобус
2) 1600:160=10 (км/ч)

Ответ: Через 10 часов они встретится

Answer 2

Problem Analysis

We are given that a car and a bus start from two different cities and travel towards each other. The car has a speed of 90 km/h, and the bus has a speed of 70 km/h. We need to determine how many hours it will take for them to meet if the distance between the cities is 1600 km.

Solution

To solve this problem, we can use the formula: time = distance / speed. We can calculate the time it takes for both the car and the bus to cover the distance between the cities, and then find the time it takes for them to meet by taking the average of their individual times.

Let's calculate the time it takes for the car and the bus to cover the distance between the cities:

- Time taken by the car = distance / car's speed = 1600 km / 90 km/h = 17.78 hours - Time taken by the bus = distance / bus's speed = 1600 km / 70 km/h = 22.86 hours

Now, let's find the average of these two times to determine the time it takes for them to meet:

- Average time = (time taken by the car + time taken by the bus) / 2 = (17.78 hours + 22.86 hours) / 2 = 20.32 hours

Therefore, it will take approximately 20.32 hours for the car and the bus to meet.

Answer

The car and the bus will meet approximately after 20.32 hours if they start from two different cities and travel towards each other at speeds of 90 km/h and 70 km/h, respectively, with a distance of 1600 km between the cities.