Question

помогите решить задачу; ИЗ двух посёлков, расстояние между которыми 75км, вышли одновременно навстречу друг другу два лыжника. Первый идёт со скоростью 12км/ч, а второй со скоростью 13км/ч. Они идут уже 2 часа. Какое расстояние им надо ещё пройти до встречи? Сколько времени это займёт?

Answer 1

1)12•2+13•2=37(км/ч)-скорость двух лыжников.
2)75-37=38(км)-оставшееся расстояние до встречи.
3)38:2=19(ч)-займёт времени что-бы они встретились.

Answer 2

Problem Analysis

We are given that two skiers start simultaneously from two villages that are 75 km apart. The first skier has a speed of 12 km/h, and the second skier has a speed of 13 km/h. They have been skiing for 2 hours, and we need to find the distance they still need to cover to meet each other and the time it will take for them to meet.

Solution

To find the distance they still need to cover to meet each other, we can calculate the total distance covered by both skiers and subtract it from the total distance between the villages.

The first skier has been skiing for 2 hours at a speed of 12 km/h, so the distance covered by the first skier is 2 hours multiplied by 12 km/h.

The second skier has also been skiing for 2 hours at a speed of 13 km/h, so the distance covered by the second skier is 2 hours multiplied by 13 km/h.

To find the distance they still need to cover to meet each other, we subtract the sum of the distances covered by both skiers from the total distance between the villages.

Let's calculate the distance they still need to cover:

Distance covered by the first skier: 2 hours * 12 km/h = 24 km

Distance covered by the second skier: 2 hours * 13 km/h = 26 km

Total distance covered by both skiers: 24 km + 26 km = 50 km

Distance they still need to cover to meet each other: 75 km - 50 km = 25 km

So, they still need to cover 25 km to meet each other.

To calculate the time it will take for them to meet, we can divide the remaining distance by the sum of their speeds.

Let's calculate the time it will take for them to meet:

Remaining distance: 25 km

Sum of their speeds: 12 km/h + 13 km/h = 25 km/h

Time it will take for them to meet: 25 km / 25 km/h = 1 hour

So, it will take them 1 hour to meet each other.

Therefore, the skiers still need to cover 25 km to meet each other, and it will take them 1 hour to do so.

Answer

The skiers still need to cover 25 km to meet each other, and it will take them 1 hour to do so.