Question

Осенью взрослая рыба отложила 3200 икринок.Весной следующего года появилось 640 мальков из отложенных икринок,что в 5 раз меньше,чем было икринок.Сколько взрослых рыб доплыли до моря,если только десятая часть всех мальков смогла уцелеть? обведи красным цветом данные,которые являются избыточными для нахождения искомого

Answer 1

1/10 часть в данном случае это 64 т.к 640/10=64, избыточные данные - кол-во отложенных икринок взрослой рыбой
Ответ:64

Answer 2

Calculation of the Number of Adult Fish

To calculate the number of adult fish that reached the sea, we need to use the given information about the number of eggs laid and the number of fry that hatched.

According to the information provided, the adult fish laid 3200 eggs in the fall. In the following spring, only 640 fry hatched from these eggs, which is 5 times less than the number of eggs laid.

To find the number of adult fish, we need to determine the survival rate of the fry. It is mentioned that only one-tenth (10%) of all the fry were able to survive.

Let's calculate the number of adult fish that reached the sea:

1. Number of fry that hatched: 640 (given) 2. Survival rate of fry: 10% (given) 3. Number of adult fish: Number of fry / Survival rate

Number of adult fish = 640 / 0.1 = 6400

Therefore, 6400 adult fish reached the sea.

Redundant Information

The following information provided in the question is not necessary to solve the problem:

- The weight of the fish - The dates mentioned in the search result snippet

These details do not contribute to finding the number of adult fish that reached the sea.