Question

Из города a в город б одновременно выехали 2 автомобиля Скорость первого автомобиля 80 км в час а второго 60 км в час Найдите расстояние между городами если известно что второй автомобиль доехал до города б на 2 часа позже первого

Answer 1

Для начала надо найти расстояние второго автомобиля надо 1)60•2=180(км)-расстояние первого автомобиля 2)180-80=100(ч.) -время 1 автомобиля 3)80•100=8000(км)-расстояние 2 автомобиля 4)8000+180=8180расстояния между городами

Answer 2

Problem Analysis

Two cars are traveling from city A to city B simultaneously. The first car has a speed of 80 km/h, and the second car has a speed of 60 km/h. The second car arrives at city B 2 hours later than the first car. We need to find the distance between the two cities.

Solution

Let's assume the distance between city A and city B is d km.

The time taken by the first car to travel from city A to city B is given by: time taken by first car = distance / speed of first car = d / 80

The time taken by the second car to travel from city A to city B is given by: time taken by second car = distance / speed of second car = d / 60

According to the problem, the second car arrives at city B 2 hours later than the first car. So, we can write the equation: time taken by second car = time taken by first car + 2

Substituting the values, we get: d / 60 = d / 80 + 2

To solve this equation, we can cross-multiply and simplify: 80d = 60d + 160 20d = 160 d = 8

Therefore, the distance between city A and city B is 8 km.

Answer

The distance between city A and city B is 8 km.