Question

Человек упал в колодец высотою 30 м. За 1 час он забирается на высоту 2м и спускается на 1 м. Через сколько часов человек выберется из колодца?Награда:15 пунктов

Answer 1

30:(2-1)=30,Ответ:30часов

Answer 2

30/(2-1)=30, через 30 часов

Answer 3

Problem Analysis

To solve this problem, we need to determine how many hours it will take for a person to climb out of a well. The person climbs 2 meters in one hour and then descends 1 meter. We need to find the total number of hours it will take for the person to reach a height of 30 meters and climb out of the well.

Solution

Let's break down the problem step by step:

1. In the first hour, the person climbs 2 meters. 2. In the second hour, the person climbs another 2 meters, reaching a total height of 4 meters. 3. In the third hour, the person climbs another 2 meters, reaching a total height of 6 meters. 4. In the fourth hour, the person climbs another 2 meters, reaching a total height of 8 meters. 5. In the fifth hour, the person climbs another 2 meters, reaching a total height of 10 meters. 6. In the sixth hour, the person climbs another 2 meters, reaching a total height of 12 meters. 7. In the seventh hour, the person climbs another 2 meters, reaching a total height of 14 meters. 8. In the eighth hour, the person climbs another 2 meters, reaching a total height of 16 meters. 9. In the ninth hour, the person climbs another 2 meters, reaching a total height of 18 meters. 10. In the tenth hour, the person climbs another 2 meters, reaching a total height of 20 meters. 11. In the eleventh hour, the person climbs another 2 meters, reaching a total height of 22 meters. 12. In the twelfth hour, the person climbs another 2 meters, reaching a total height of 24 meters. 13. In the thirteenth hour, the person climbs another 2 meters, reaching a total height of 26 meters. 14. In the fourteenth hour, the person climbs another 2 meters, reaching a total height of 28 meters. 15. In the fifteenth hour, the person climbs another 2 meters, reaching a total height of 30 meters.

At this point, the person has reached a height of 30 meters. However, they still need to climb out of the well. Since they descend 1 meter every hour, it will take them an additional 1 hour to climb out of the well.

Therefore, it will take the person a total of 16 hours to climb out of the well.

Answer

The person will climb out of the well in 16 hours.

Note: The sources provided do not contain relevant information for this specific problem.