Question

По лыжной трассе в одной направлении идут два лыжника.Сейчас расстояние между ними 2,4 км.Скорость лыжника,идущего впереди,9,6 км/час,а скорость лыжника ,идущего сзади,13,2 км/час.Через сколько времени второй лыжник догонит первого?

Answer 1

За 1 час, так как:
9, 6 км/ч - скор. первого
13, 2 км/ч - скорость второго
9, 6 * 1=9,6 км
13,2 * 1= 13,2 км
9, 6 + 2, 4 = 12 км прошёл первый
А второй 13,2, то есть он уже догнал первого.

Answer 2

Problem Analysis

We have two skiers on a ski trail, with one skier ahead of the other. The distance between them is 2.4 km. The skier in front is moving at a speed of 9.6 km/h, while the skier behind is moving at a speed of 13.2 km/h. We need to determine how long it will take for the second skier to catch up to the first skier.

Solution

To solve this problem, we can use the formula: time = distance / speed. We'll calculate the time it takes for the second skier to cover the distance between them.

Let's calculate the time it takes for the second skier to catch up to the first skier:

1. Calculate the relative speed of the second skier with respect to the first skier: - Relative speed = Speed of the second skier - Speed of the first skier - Relative speed = 13.2 km/h - 9.6 km/h = 3.6 km/h

2. Calculate the time it takes for the second skier to cover the distance between them: - Time = Distance / Relative speed - Time = 2.4 km / 3.6 km/h

Now, let's calculate the time:

Time = 2.4 km / 3.6 km/h = 0.67 hours

Answer

The second skier will catch up to the first skier in approximately 0.67 hours.

Note: The answer is rounded to two decimal places.