Question

Расстояние междц домами Саши и Вити 3 км. Саша прохоходит это расстояние ха полчаса, а Вится за час. Они договорились встретиться . Иальчики одновременно вышли из своих домов. Через какое время они встретятся

Answer 1

1) 3:1/2=6 км/ч скорость Саши

2) 3+6=9 км/ч скорость сближения Саши и Вити

3) 3:9=1/3 часа или через 1/3*60=20 минут встретятся Саша и Витя

Ответ через 20 минут

Answer 2

Problem Analysis

We are given that the distance between Sasha's and Vitya's houses is 3 km. Sasha walks this distance in half an hour, while Vitya takes an hour. We need to determine how long it will take for them to meet.

Solution

To solve this problem, we can use the concept of relative speed. The relative speed between Sasha and Vitya is the sum of their individual speeds. Sasha's speed is 3 km/hour (since he covers 3 km in half an hour), and Vitya's speed is 3 km/hour (since he covers 3 km in one hour). Therefore, their relative speed is 6 km/hour.

To find the time it takes for them to meet, we can divide the distance between their houses (3 km) by their relative speed (6 km/hour):

Time = Distance / Relative Speed = 3 km / 6 km/hour = 0.5 hour = 30 minutes

Therefore, Sasha and Vitya will meet after 30 minutes.

Answer

Sasha and Vitya will meet after 30 minutes.