Question

Масса пустого бочонка 2кг.В него входит 8 кг мёда.Найди массу 7 таких бочонков,наполненных мёдом.Реши задачу двумя способами.

Answer 1

1)(2+8)*7=70
2)8*7+2*7=70

Answer 2

Problem Statement

We have a barrel that weighs 2 kg when empty. When filled with honey, it weighs 8 kg. We need to find the total weight of 7 such barrels filled with honey. Let's solve this problem using two different methods.

Method 1: Direct Calculation

To find the total weight of 7 barrels filled with honey, we can multiply the weight of a single barrel filled with honey by the number of barrels.

Given: - Weight of an empty barrel = 2 kg - Weight of a barrel filled with honey = 8 kg - Number of barrels = 7

Step 1: Calculate the weight of a single barrel filled with honey: - Weight of a barrel filled with honey = 8 kg

Step 2: Calculate the total weight of 7 barrels filled with honey: - Total weight = Weight of a barrel filled with honey * Number of barrels - Total weight = 8 kg * 7 - Total weight = 56 kg

Therefore, the total weight of 7 barrels filled with honey is 56 kg.

Method 2: Using the Difference in Weights

Another way to solve this problem is by finding the weight of honey in a single barrel and then multiplying it by the number of barrels.

Given: - Weight of an empty barrel = 2 kg - Weight of a barrel filled with honey = 8 kg - Number of barrels = 7

Step 1: Calculate the weight of honey in a single barrel: - Weight of honey in a single barrel = Weight of a barrel filled with honey - Weight of an empty barrel - Weight of honey in a single barrel = 8 kg - 2 kg - Weight of honey in a single barrel = 6 kg

Step 2: Calculate the total weight of 7 barrels filled with honey: - Total weight = Weight of honey in a single barrel * Number of barrels - Total weight = 6 kg * 7 - Total weight = 42 kg

Therefore, the total weight of 7 barrels filled with honey is 42 kg.

Conclusion

Using both methods, we found that the total weight of 7 barrels filled with honey is either 56 kg or 42 kg, depending on the method used.