Question

Решие задачу,сосавив выражение:Один рабочий изготовляет за час 7 деталей,а другой-9 деталий.Сколько деталей они изготовят за 4 часа?

Answer 1

Problem Analysis

We are given that one worker can produce 7 parts in one hour, and another worker can produce 9 parts in one hour. We need to find out how many parts they can produce together in 4 hours.

Solution

To find the total number of parts produced by both workers in 4 hours, we need to calculate the individual production rates and then add them together.

Let's calculate the number of parts produced by the first worker in 4 hours: - The first worker produces 7 parts in 1 hour. - So, in 4 hours, the first worker will produce 7 * 4 = 28 parts.

Now, let's calculate the number of parts produced by the second worker in 4 hours: - The second worker produces 9 parts in 1 hour. - So, in 4 hours, the second worker will produce 9 * 4 = 36 parts.

To find the total number of parts produced by both workers in 4 hours, we add the individual production rates: - The first worker produces 28 parts in 4 hours. - The second worker produces 36 parts in 4 hours. - Therefore, both workers together will produce 28 + 36 = 64 parts in 4 hours.

Answer

The two workers will produce 64 parts in 4 hours.