Question

По спортивной дорожке длинной200м побежали одновременно навстречу друг другу Миша и Дима.Встретились они через 20 секунд Миша бежал со скоростью 4м/с. С кокой скоростью бежал Дима? Запиши вопросы к данным действим. Решение

Answer 1

1) Сколько метров пробежал Миша за 20 секунд?

   4 м/с × 20 с = 80 метров

2) Сколько метров пробежал Дима за это же время?

   200 м - 80 м= 120 метров

3) с какой скоростью бежал Дима?

   120 м ÷ 20 с = 6 м/с

4) На сколько Дима бежал быстрее Миши? 

   6 м/с - 4 м/с = 2 м/с

Answer 2

Problem Analysis

We are given that Misha and Dima started running towards each other on a 200-meter long track and met after 20 seconds. We also know that Misha was running at a speed of 4 m/s. We need to determine the speed at which Dima was running.

Solution

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

Since Misha and Dima were running towards each other, the total distance covered by both of them is equal to the length of the track, which is 200 meters.

Let's assume that Dima's speed is x m/s.

We can set up the following equation based on the information given:

Misha's distance + Dima's distance = Total distance

Misha's speed * time + Dima's speed * time = Total distance

Substituting the values we know:

4 m/s * 20 s + x m/s * 20 s = 200 m

Simplifying the equation:

80 m + 20x m = 200 m

20x m = 200 m - 80 m

20x m = 120 m

x m = 120 m / 20

x m = 6 m/s

Therefore, Dima was running at a speed of 6 m/s.

Answer

Dima was running at a speed of 6 m/s.