Question

СОБАКА Заметила кошку,когда расстояние между ними было 50м.Они побежали одновременно.Кошка со скоростью 5м/с,а собака вдогонку со скоростью 7м/с.Через сколько секунд собака догонит кошку?

Answer 1

1)7-5=2(м в сек)
2)50:2-25(сек)
ответ через 25 секунд собака догонит кошку

Answer 2

Problem Analysis

We are given that a dog notices a cat when the distance between them is 50 meters. They both start running simultaneously, with the cat running at a speed of 5 m/s and the dog chasing it at a speed of 7 m/s. We need to determine how many seconds it will take for the dog to catch up to the cat.

Solution

To solve this problem, we can use the formula:

time = distance / speed

The distance between the dog and the cat is decreasing at a rate of 7 m/s - 5 m/s = 2 m/s (since the dog is running faster than the cat). Therefore, the dog will catch up to the cat when the distance between them becomes zero.

Let's calculate the time it takes for the dog to catch up to the cat:

time = distance / relative speed

Since the relative speed is 2 m/s, and the initial distance is 50 meters, we can substitute these values into the formula:

time = 50 m / 2 m/s = 25 seconds

Therefore, it will take the dog 25 seconds to catch up to the cat.

Answer

The dog will catch up to the cat in 25 seconds.