Question

Нина прочитала 30 процентов книги, а если она прочтёт ещё 50 страниц, то она прочтёт 55 процентов. Сколько всего страниц в книге. Решите! Плез

Answer 1

55-30=25
50 страниц есть 25 процентов найдем сколко страниц составляет один процент 
50:25=2
Найдем все страницы 2*100=200

Answer 2

Solution:

Let's solve the problem step by step.

Given: - Nina has read 30% of the book. - If she reads another 50 pages, she will have read 55% of the book.

Let's denote the total number of pages in the book as x.

According to the given information, we can form the following equation: 30% of x + 50 = 55% of x

Calculation:

30% of x + 50 = 55% of x

0.3x + 50 = 0.55x

Subtract 0.3x from both sides:

50 = 0.25x

Now, solve for x:

x = 50 / 0.25

x = 200

So, the total number of pages in the book is 200.

Therefore, the book has a total of 200 pages.

I hope this helps! If you have further questions, feel free to ask.