Question

За три дня оператор набрал на компьютере 60 страниц.В первый день было выполнено 35% всей работы. Объём работы,выполненной в первый день, составляет 70% работы, выполненной во второй день. Сколько страниц было набрано в третий день?

Answer 1

Проще всего составить пропорцию
60-100
х-35
х=60*35:100=21стр.(выполнено в первый день работы)

21-70
х-100
х=21*100:70=30стр.(выполнено на второй день)
60-21-30=9стр.
ответ:в третий день было набрано 9 страниц

Answer 2

Problem Analysis

We are given that an operator typed 60 pages on a computer over the course of three days. On the first day, 35% of the work was completed, and the work completed on the first day represents 70% of the work completed on the second day. We need to determine how many pages were typed on the third day.

Solution

Let's break down the information given: - The operator typed a total of 60 pages over three days. - On the first day, 35% of the work was completed. - The work completed on the first day represents 70% of the work completed on the second day.

To find the number of pages typed on the third day, we need to determine the remaining percentage of work completed on the second day and allocate it to the third day.

Let's calculate the number of pages typed on the first day: - 35% of the total work is completed on the first day. - This represents 70% of the work completed on the second day.

To find the total work completed on the second day, we can use the following equation: 0.7 * total_work_on_second_day = work_completed_on_first_day

Let's solve for the total work on the second day: total_work_on_second_day = work_completed_on_first_day / 0.7

Now, we can find the remaining work on the second day: remaining_work_on_second_day = total_work_on_second_day - work_completed_on_first_day

Finally, to find the number of pages typed on the third day, we subtract the remaining work on the second day from the total number of pages typed over three days: pages_typed_on_third_day = total_pages_typed - work_completed_on_first_day - remaining_work_on_second_day

Let's calculate the values:

1. Calculate the work completed on the first day: - work_completed_on_first_day = 0.35 * total_pages_typed

2. Calculate the total work on the second day: - total_work_on_second_day = work_completed_on_first_day / 0.7

3. Calculate the remaining work on the second day: - remaining_work_on_second_day = total_work_on_second_day - work_completed_on_first_day

4. Calculate the number of pages typed on the third day: - pages_typed_on_third_day = total_pages_typed - work_completed_on_first_day - remaining_work_on_second_day

Let's substitute the values and calculate the result:

1. Calculate the work completed on the first day: - work_completed_on_first_day = 0.35 * 60 = 21 pages

2. Calculate the total work on the second day: - total_work_on_second_day = 21 / 0.7 = 30 pages

3. Calculate the remaining work on the second day: - remaining_work_on_second_day = 30 - 21 = 9 pages

4. Calculate the number of pages typed on the third day: - pages_typed_on_third_day = 60 - 21 - 9 = 30 pages

Therefore, 30 pages were typed on the third day.

Answer

The number of pages typed on the third day is 30.