Question

Дерево 20 м за день улитка проползает 2 м, а ночью сползает на 1 м. За сколько дней она доползёт до вершины дерева?

Answer 1

2-1=1 м за сутки; 18*1=18 м за 18 дней; 18+2=20 м достигнет на 19 день улитка и ночью спустится на 1 метр вниз; Ответ: на 19 день достигнет

Answer 2

Problem Analysis

We are given that a snail crawls up a tree during the day, covering a distance of 2 meters, but at night it slides down 1 meter. We need to determine how many days it will take for the snail to reach the top of a 20-meter tree.

Solution

To solve this problem, we can calculate the net distance covered by the snail each day. During the day, the snail crawls up 2 meters, and at night it slides down 1 meter. Therefore, the net distance covered by the snail each day is 2 meters - 1 meter = 1 meter.

To find the number of days it will take for the snail to reach the top of the tree, we can divide the total height of the tree (20 meters) by the net distance covered by the snail each day (1 meter).

Using this information, we can calculate the number of days as follows:

Number of days = Total height of the tree / Net distance covered by the snail each day

Number of days = 20 meters / 1 meter

Number of days = 20 days

Therefore, it will take the snail 20 days to reach the top of the tree.

Answer

The snail will take 20 days to crawl to the top of the 20-meter tree.