Question

Расстояние между двумя селами равно 57 км. Из первого села выехал велосипедист со скоростью 11 км/ч. Через час навстречу ему из второго села выехал еще один велосипедист со скоростью 12 км/ч. Через сколько часов после выезда второго велосипедиста они встретятся?

Answer 1

Так как они едут на встречу, то их средння скорость будет: 12+11=23 км чс .
первый проехал уже час значит: 11км /ч *1 час =11 км
57-11= 46 км - осталось пути.
46/23 = 2 через это время они встретятся
ответ 2 часа

Answer 2

Problem Analysis

We are given that the distance between two villages is 57 km. A cyclist starts from the first village with a speed of 11 km/h, and after an hour, another cyclist starts from the second village with a speed of 12 km/h. We need to determine how many hours it will take for them to meet.

Solution

To solve this problem, we can use the formula: time = distance / speed.

Let's calculate the time it takes for the first cyclist to meet the second cyclist.

The distance covered by the first cyclist in one hour is 11 km, as their speed is 11 km/h.

Since the total distance between the two villages is 57 km, the remaining distance that needs to be covered by both cyclists is 57 km - 11 km = 46 km.

Now, we can calculate the time it takes for the second cyclist to cover this remaining distance. The speed of the second cyclist is 12 km/h.

Using the formula time = distance / speed, we can calculate the time it takes for the second cyclist to cover the remaining distance:

time = 46 km / 12 km/h

Let's calculate this:

time = 46 km / 12 km/h

Using a calculator, we find that the time it takes for the second cyclist to cover the remaining distance is approximately 3.83 hours.

Therefore, the two cyclists will meet approximately 3.83 hours after the second cyclist starts.

Answer

The two cyclists will meet approximately 3.83 hours after the second cyclist starts their journey.