Question

Решите задачу: Два велосипедиста выехали одновременно на встречу друг другу из поселков, расстояние между которыми 7 км, и встретились через 20 мин. Скорость одного велосипедиста 200 м/мин. Определи скорость второго велосипедиста.

Answer 1

За 20 мин первый проехал 200*20=4000метров или 4 км 
значит другой за это время проехал 7-4=3 км или 3000 метров 
его скорость 3000/20=150 м/мин

Answer 2

Problem Analysis

Two cyclists start from different villages towards each other, and they meet after 20 minutes. The distance between the villages is 7 km. One cyclist's speed is 200 m/min. We need to determine the speed of the second cyclist.

Solution

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

Let's denote the speed of the second cyclist as v.

The total distance covered by both cyclists is 7 km, and they meet after 20 minutes. We can set up the following equation: 200 m/min × 20 min + v × 20 min = 7000 m

Calculation

Solving for v: 200 m/min × 20 min + v × 20 min = 7000 m 4000 m + 20v = 7000 m 20v = 7000 m - 4000 m 20v = 3000 m v = 3000 m / 20 v = 150 m/min

Answer

The speed of the second cyclist is 150 m/min.