Question

Из двух поселков, расстояние между которыми 320 км одновременно в одном направлении выехали 2 автомобиля.Скорость первого 85 км/ч а второго 65 км/ч .Через сколько часов второй автомобиль догонит первый?

Answer 1

Скорость сближения=85-65=20км/ч; каждый час расстояние сокращается на 20км; 320:20=16ч. Через 16 часов  автомобили встретятся))))

Answer 2

Calculating the time taken for the second car to catch up to the first car

The question states that two cars started travelling in the same direction from two different villages 320 km apart. The speed of the first car is 85 km/h and the speed of the second car is 65 km/h.

To calculate the time taken, we can use the formula: Time = Distance / Speed

* Distance between the villages: 320 km * Speed of first car: 85 km/h = 23.61 km/h * Speed of second car: 65 km/h = 18.06 km/h

* Distance covered by first car in 1 hour: 23.61 km * Distance covered by second car in 1 hour: 18.06 km * Difference in distance covered per hour: 23.61 - 18.06 = 5.55 km

* Total distance to be covered by second car to catch first car: 320 km * Distance covered per hour faster by first car: 5.55 km/h * Time taken = Total Distance / Difference in Speeds = 320 km / 5.55 km/h = 57.66 hours ≈ 58 hours

Therefore, the time taken for the second car travelling at 65 km/h to catch up to the first car travelling at 85 km/h is 58 hours.