Question

Задача одна машинистка за 1 час печатает 12 страниц другая за 15 . сколько времени потреьуется машинисткам чтобы напечатать 162 страницы если они будут рабоиать вмнсте

Answer 1

12+15=27страниц они печатают вместе
162:27=6 часов
ответ:6 часов понадобится

Answer 2

12+15=27(стр.)-общая работа за 1 час.
162:27=6(ч)-понадобится.

Answer 3

Problem Analysis

We have two machine operators, one who can print 12 pages in 1 hour and another who can print 15 pages in 1 hour. We need to find out how long it will take for them to print 162 pages if they work together.

Solution

To find the time it will take for the two machine operators to print 162 pages, we can calculate the combined rate at which they print pages and then divide the total number of pages by this combined rate.

Let's calculate the combined rate at which they print pages: - The first machine operator can print 12 pages in 1 hour, so their rate is 12 pages per hour. - The second machine operator can print 15 pages in 1 hour, so their rate is 15 pages per hour.

To find the combined rate, we can add the rates of the two machine operators: - Combined rate = rate of the first machine operator + rate of the second machine operator - Combined rate = 12 pages per hour + 15 pages per hour - Combined rate = 27 pages per hour

Now, we can calculate the time it will take for them to print 162 pages using the combined rate: - Time = total number of pages / combined rate - Time = 162 pages / 27 pages per hour - Time = 6 hours

Therefore, it will take the two machine operators 6 hours to print 162 pages if they work together.

Answer

The two machine operators will need 6 hours to print 162 pages if they work together.