Question

Математика Брат и сестра поливали грядку длиной 15 м ,двигаясь с разных сторон навстречу друг другу сколько метров полил брат ,если сестра до встречи с ним родила 7 м .условие задачи

Answer 1

15-7=8 (м) грядки полил брат

Answer 2

Problem Statement:

A brother and a sister were watering a 15-meter-long garden bed, moving towards each other from opposite ends. The sister watered 7 meters before meeting the brother. The question is, how many meters did the brother water?

Solution:

To solve this problem, we can use the concept of relative speed. When two people move towards each other, their speeds are added. The time taken to meet is the same for both of them.

Let's denote the distance the brother watered as x meters. The sister watered 7 meters before meeting the brother, so the remaining distance for the brother to water is (15 - 7) = 8 meters.

Using the formula: Speed = Distance / Time, we can calculate the brother's speed as x / t and the sister's speed as 8 / t, where t is the time taken to meet.

Since the time taken to meet is the same for both of them, we can set up the equation: x / t = 8 / t

By canceling out t from both sides, we get: x = 8

So, the brother watered 8 meters before meeting the sister.

Conclusion:

Therefore, the brother watered 8 meters before meeting the sister.