Question

Мальчик прочитал книгу за 3 дня в первый день - 40 % , во второй день - 60% и еще 4 страницы, в 3 день- 75% и последние 3 страницы, сколько страниц в книге?

Answer 1

Всего страниц в книге - х
х=4:45х+2:9х+69
х-4:15х-2:9х=69
45:45х-12:45х-10:45х=69
23:45х=69
23х=69*45
23х=3105
х=3105:23=135 (стр.) -всего в книге
135*4/:15=9*4=36 (стр.) - прочитал в 1 день
135*2:9=15*2= 30 (стр.)- прочитал во 2 день

Answer 2

Calculation of the Number of Pages in the Book

To calculate the number of pages in the book, we need to determine the number of pages read on each day and add them together.

Let's break down the information provided:

- On the first day, the boy read 40% of the book. - On the second day, he read 60% of the book and an additional 4 pages. - On the third day, he read 75% of the book and the remaining 3 pages.

To calculate the number of pages read on each day, we need to know the total number of pages in the book. Unfortunately, the total number of pages is not provided in the question or the search results. Therefore, we cannot determine the exact number of pages in the book.

However, we can still provide a general approach to solving this type of problem.

Let's assume the total number of pages in the book is X.

- On the first day, the boy read 40% of X pages. - On the second day, he read 60% of X pages and an additional 4 pages. - On the third day, he read 75% of X pages and the remaining 3 pages.

We can set up the following equation to solve for X:

0.4X + 0.6X + 4 + 0.75X + 3 = X

Simplifying the equation:

1.75X + 7 = X

0.75X = 7

X = 7 / 0.75

X ≈ 9.33

Therefore, the approximate number of pages in the book is 9.33.

Please note that this is an approximation since we assumed the total number of pages in the book. The actual number of pages may vary.