Question

Из двух посёлков, находящихся на расстоянии 78 км, вышли одновременно навстречу друг другу два лыжника и встретились через 3 часа. первый лыжник шёл со скоростью 12 км/ч. С какой скоростью шёл второй лыжник? ПОЖАЛУЙСТА НАПИШИТЕ ОТВЕТ!

Answer 1

3х12=36 км - 1 прошел
78-36=42 км - 2 ппрошел
42:3=14 км\ч - ск второго
   Ответ:14 км\ч

Answer 2

Problem Analysis

We have two skiers who start simultaneously from two villages that are 78 km apart. They meet each other after 3 hours. The first skier is traveling at a speed of 12 km/h. We need to determine the speed at which the second skier is traveling.

Solution

To solve this problem, we can use the formula:

Distance = Speed × Time

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

The distance covered by the first skier is given by:

Distance1 = Speed1 × Time

Substituting the given values:

Distance1 = 12 km/h × 3 hours

The distance covered by the second skier is given by:

Distance2 = Speed2 × Time

Substituting the given values:

Distance2 = x km/h × 3 hours

Since they meet each other, the sum of their distances should be equal to the total distance between the villages:

Distance1 + Distance2 = 78 km

Substituting the values:

(12 km/h × 3 hours) + (x km/h × 3 hours) = 78 km

Simplifying the equation:

36 km/h + 3x km/h = 78 km

Combining like terms:

3x km/h = 78 km - 36 km/h

3x km/h = 42 km

Dividing both sides by 3:

x km/h = 42 km / 3

x km/h = 14 km/h

Therefore, the second skier is traveling at a speed of 14 km/h.

Answer

The second skier is traveling at a speed of 14 km/h.