Question

4 класс - Мастер и ученик 3 часа выпиливали детали. Мастер выпилил 20 деталей в час, а его ученик за это же время сделал половину работы, выполненной мастером. Сколько деталей они выпилили за это время вместе? с условием

Answer 1

Ученик сделал за 1 час 20/2=10 дет.
20+10=30 дет. сделали вместе за 1 час.

Answer 2

Problem Analysis

In this problem, we are given that a master and his apprentice spent 3 hours working together. The master can produce 20 parts in one hour, while the apprentice completes half of the work done by the master in the same amount of time. We need to determine how many parts they produced together during this time.

Solution

Let's break down the problem step by step:

1. The master can produce 20 parts in one hour. 2. The apprentice completes half of the work done by the master in the same amount of time. 3. They worked together for 3 hours.

To find the total number of parts they produced together, we need to calculate the sum of the parts produced by the master and the apprentice.

Let's calculate the number of parts produced by the master: - The master produces 20 parts in one hour. - They worked together for 3 hours. - Therefore, the master produced 20 parts/hour * 3 hours = 60 parts.

Now let's calculate the number of parts produced by the apprentice: - The apprentice completes half of the work done by the master in the same amount of time. - Since the master produced 60 parts, the apprentice completed half of 60 parts = 30 parts.

Finally, let's calculate the total number of parts produced by both the master and the apprentice: - The master produced 60 parts. - The apprentice produced 30 parts. - Therefore, the total number of parts they produced together is 60 parts + 30 parts = 90 parts.

Answer

The master and his apprentice produced 90 parts together during the 3 hours they worked.

Explanation

The master produced 60 parts, while the apprentice completed half of the work done by the master, which is 30 parts. Therefore, the total number of parts they produced together is 90 parts.