Question

Одна машинистка печатает 9 страниц за час а другая за 6 часов печатает 9 страниц столько же сколько первая за 4 часа.Сколько страниц страниц напечатает вторая за 5 часов?

Answer 1

Вот тут всё написано, надеюсь понятно

Answer 2

Problem Analysis

We are given that one typist can type 9 pages in 1 hour, while another typist can type 9 pages in 6 hours. We need to find out how many pages the second typist can type in 5 hours.

Solution

To solve this problem, we can use the concept of rates. The rate at which the first typist types is 9 pages per hour, and the rate at which the second typist types is 9 pages in 6 hours. Let's calculate the rate at which the second typist types.

The rate at which the second typist types is given by:

Rate of second typist = (Number of pages typed) / (Number of hours)

We are given that the second typist types 9 pages in 6 hours. Using this information, we can calculate the rate of the second typist:

Rate of second typist = 9 pages / 6 hours = 1.5 pages per hour.

Now, we need to find out how many pages the second typist can type in 5 hours. We can use the rate of the second typist to calculate this:

Number of pages typed by second typist = (Rate of second typist) * (Number of hours)

Substituting the values, we get:

Number of pages typed by second typist = 1.5 pages per hour * 5 hours = 7.5 pages.

Therefore, the second typist can type 7.5 pages in 5 hours.

Answer

The second typist can type 7.5 pages in 5 hours.