Question

Из двух городов навстречу друг другу одновременно выехали 2 автомобиля и встретились через 2часа.Скорость одного - 70км/ч, другого - 90км/ч. Чему равно расстояние между городами?

Answer 1

70+90=160(км/ч) скорость сближения
160*2=320 ( км)

Answer 2

Problem Analysis

We have two cars traveling towards each other from two different cities. The first car has a speed of 70 km/h, and the second car has a speed of 90 km/h. They meet each other after 2 hours. We need to find the distance between the two cities.

Solution

To find the distance between the two cities, we can use the formula:

Distance = Speed × Time

Let's calculate the distance traveled by each car and then find the total distance between the two cities.

1. Distance traveled by the first car: - Speed of the first car = 70 km/h - Time taken = 2 hours - Distance = Speed × Time = 70 km/h × 2 hours = 140 km

2. Distance traveled by the second car: - Speed of the second car = 90 km/h - Time taken = 2 hours - Distance = Speed × Time = 90 km/h × 2 hours = 180 km

3. Total distance between the two cities: - Total distance = Distance traveled by the first car + Distance traveled by the second car = 140 km + 180 km = 320 km

Therefore, the distance between the two cities is 320 km.