Question

Две черепахи,расстояние между которыми составляет 6 м, поползли на встречу друг другу по песчаному берегу.За 1 минуту одна из них проползает 80 см,вторая-70см.Через сколько минут черепахи встретятся?

Answer 1

Скорость сближения черепах=70+80=150см=1.5м

Т.к. расстояние равно 6м, то время равно 6/1.5=4мин

Ответ: 4 мин

Answer 2

6 метров = 600 сантиметров
1 минута - 150 сантиметров (1+2 черепаха)
600/150 = 4
Ответ: 4 минуты. 

Answer 3

Problem Analysis

We have two turtles crawling towards each other on a sandy beach. The distance between them is 6 meters. One turtle crawls 80 cm per minute, while the other turtle crawls 70 cm per minute. We need to determine how many minutes it will take for the turtles to meet.

Solution

To solve this problem, we can calculate the time it takes for each turtle to cover the distance between them and find the minimum time.

Let's calculate the time it takes for the first turtle to cover the distance: - The first turtle crawls 80 cm per minute. - The distance between the turtles is 6 meters, which is equal to 600 cm. - Therefore, the time it takes for the first turtle to cover the distance is 600 cm / 80 cm per minute = 7.5 minutes.

Now, let's calculate the time it takes for the second turtle to cover the distance: - The second turtle crawls 70 cm per minute. - The distance between the turtles is 6 meters, which is equal to 600 cm. - Therefore, the time it takes for the second turtle to cover the distance is 600 cm / 70 cm per minute = 8.57 minutes (rounded to two decimal places).

Since the second turtle takes slightly longer to cover the distance, we can conclude that the turtles will meet after approximately 8.57 minutes.

Answer

The two turtles will meet after approximately 8.57 minutes.

Source:

- No specific source was found for this problem.