Question

Волк стал догонять лису, когда между ними было 75 3/5 м. Скорость волка 16,8 м/с. Лиса убегала от волка со скоростью 10,5 м/с. Через сколько секунд волк догонит лису плиз

Answer 1

Скорость сближения волка и лисы равна: v=16.8-10.5=6.3 (м/с)
При такой скорости расстояние 75(3/5) будет пройдено за время t=75(3/5)/6.3;
t=75.6/6.3;
t=12(c)

Answer 2

Problem Analysis

We are given that a wolf is chasing a fox, and the distance between them is 75 3/5 m. The wolf's speed is 16.8 m/s, and the fox is running away at a speed of 10.5 m/s. We need to find out how many seconds it will take for the wolf to catch up to the fox.

Solution

To solve this problem, we can use the formula:

time = distance / speed

Let's calculate the time it will take for the wolf to catch up to the fox.

Calculation

The distance between the wolf and the fox is 75 3/5 m. We can convert this mixed fraction to an improper fraction:

75 3/5 = (75 * 5 + 3) / 5 = 378 / 5

The wolf's speed is 16.8 m/s, and the fox's speed is 10.5 m/s.

Using the formula, we can calculate the time it will take for the wolf to catch up to the fox:

time = distance / speed

time = (378 / 5) / (16.8 - 10.5)

time = (378 / 5) / 6.3

time = (378 / 5) * (1 / 6.3)

time = 378 / (5 * 6.3)

time = 378 / 31.5

time ≈ 12 seconds

Therefore, it will take approximately 12 seconds for the wolf to catch up to the fox.

Answer

The wolf will catch up to the fox in approximately 12 seconds.