Question

в 17 часов 45минут из дома одновременно вышли коля и серёжа и пошли в одном направлении . в какое время расстояние между ними стало равным 300м,если коля двигался со скоростью 80м/мин ,а серёжа со скоростью 100м/мин

Answer 1

100-80=20 м в минуту разница между ними была за минуту
300:20=15 минут через 15 минут разница у них будет 300 метров 

17:45+15 минут= 18ч во столько между ними будет расстояние 300 м

ответ:18ч00мин

Answer 2

Problem Analysis

We are given that Kolya and Sergey left their home at the same time and walked in the same direction. We need to determine at what time the distance between them became equal to 300 meters. We are also given that Kolya walks at a speed of 80 m/min and Sergey walks at a speed of 100 m/min.

Solution

Let's assume that it takes t minutes for the distance between Kolya and Sergey to become equal to 300 meters. During this time, Kolya would have covered a distance of 80t meters, and Sergey would have covered a distance of 100t meters.

Since they started at the same time and walked in the same direction, the distance between them can be calculated as the difference between the distances they covered:

Distance between Kolya and Sergey = 100t - 80t = 20t

We need to find the value of t when the distance between them is equal to 300 meters:

20t = 300

Solving for t:

t = 300 / 20 = 15 minutes

Therefore, the distance between Kolya and Sergey became equal to 300 meters after 15 minutes.

Answer

The distance between Kolya and Sergey became equal to 300 meters after 15 minutes.