Question

Как решить задачу из 1-ого пункта одновремено в противоположных направлениях вышли 2лыжника. Через 3часа расстояние между ними було 60км. Чему равна скорость 2-ого лыжника, если. скорость 1ого 11км. в час?

Answer 1

60:2=30-общая скорость
30-11=19-скорость второго

Answer 2

Расстояние = 60км
Время = 3ч

Скорость = Расстояние ÷ время
Скорость = 60÷3 = 20км/ч

Решено по правилу, надеюсь, что правильно

Answer 3

Problem Analysis

We have two skiers who start simultaneously in opposite directions. After 3 hours, the distance between them is 60 km. We need to find the speed of the second skier, given that the speed of the first skier is 11 km/h.

Solution

Let's assume the speed of the second skier is x km/h.

Since the skiers are moving in opposite directions, their speeds should be added together to find the relative speed between them. The relative speed is the rate at which the distance between them is changing.

After 3 hours, the distance between them is 60 km. This means that the relative speed between them is 60 km / 3 hours = 20 km/h.

Using the formula for relative speed, we can set up the following equation:

11 km/h + x km/h = 20 km/h

To find the value of x, we can subtract 11 km/h from both sides of the equation:

x km/h = 20 km/h - 11 km/h

Simplifying the equation, we get:

x km/h = 9 km/h

Therefore, the speed of the second skier is 9 km/h.

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