Question

Камень, брошенный в низ, пролетает в первую секунду 4 целых девядь десятых метра ,а в каждую следующую секунду на 9 целых восемь десятых метра больше ,чем в предыдущую.Найди глубину ущелья,если брошенный в него камень летит до дна в течение 3 секунд.Помогите можалйста по действиям !!!!! по действиям !!!!

Answer 1

1  -  1 секунда : 4 целых 9/10(по усл.)

2  -  2 секунда : 4 целых 9/10 +9 целых 8/10 = 14 целых 7/10

3  -  3 секунда : 14 целых 7/10 +9 целых 8/10 =24 целых 5/10

4  - весь полет : 4 целых 9/10  +  14 целых 7/10  +  24 целых 5/10 = 44 целых 1/10 метра

 

Ответ: 44 целых 1/10 метра

Answer 2

Problem Analysis

We are given that a stone is thrown downwards and travels a certain distance each second. In the first second, it travels 4.9 meters, and in each subsequent second, it travels 9.8 meters more than in the previous second. We need to find the depth of the abyss if the stone reaches the bottom in 3 seconds.

Solution

To find the depth of the abyss, we need to calculate the total distance traveled by the stone in 3 seconds. We can do this by summing up the distances traveled in each second.

Let's calculate the distances traveled in each second:

- In the first second, the stone travels 4.9 meters. - In the second second, the stone travels 4.9 + 9.8 = 14.7 meters. - In the third second, the stone travels 14.7 + 9.8 = 24.5 meters.

Now, let's calculate the total distance traveled by the stone in 3 seconds:

4.9 + 14.7 + 24.5 = 44.1 meters.

Therefore, the depth of the abyss is 44.1 meters.

Conclusion

The depth of the abyss, if the stone reaches the bottom in 3 seconds, is 44.1 meters.

Note: The sources provided did not contain specific information related to the problem. The solution was derived using basic mathematical calculations.