Question

Привет,помогите сделать запись задачи 4 класса,понимать понимаю,а как записать незнаю. В течение дня первые 2 часа рабочий вытачивал по 12 деталей в час,следующие 3 часа- по 10 деталей,а последние 3 часа -по 7 деталей в час.Сколько деталей в среднем выточил рабочий за один час в этот день?

Answer 1

1)2*12=24 детали за 2 часа

2)3*10=30 деталей за 3 первые часа

3)3*7=21 деталь за последнии 3 часа

4)2+3+3=8 часов всего работал

5)24+30+21=75 деталей всего за 8 часов работы

6)75:8=9,375 деталей в среднем за 1 час

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Answer 2

To solve this problem, we need to find the average number of parts produced per hour by the worker throughout the day. We can do this by calculating the total number of parts produced and dividing it by the total number of hours worked.

Let's break down the problem step by step:

1. Calculate the total number of parts produced: - For the first 2 hours, the worker produced 12 parts per hour, so the total number of parts produced in the first 2 hours is 2 * 12 = 24 parts. - For the next 3 hours, the worker produced 10 parts per hour, so the total number of parts produced in the next 3 hours is 3 * 10 = 30 parts. - For the last 3 hours, the worker produced 7 parts per hour, so the total number of parts produced in the last 3 hours is 3 * 7 = 21 parts.

2. Calculate the total number of hours worked: - The worker worked for a total of 2 + 3 + 3 = 8 hours.

3. Calculate the average number of parts produced per hour: - To find the average, we divide the total number of parts produced (24 + 30 + 21 = 75 parts) by the total number of hours worked (8 hours). - Therefore, the average number of parts produced per hour by the worker in this day is 75 / 8 = 9.375 parts per hour.

So, the worker produced an average of 9.375 parts per hour on this day.

Let me know if you need any further assistance!