Question

No8. Таня прочитала 70% всех страниц книги, и осталось прочитать 240 страниц. Сколько страниц в книге? Решение: Математика 6 класс

Answer 1

100%-70%=30%

30% книги=240

1% книги=8

Всего: 8*100=800 страниц

Answer 2

Problem Statement

Таня прочитала 70% всех страниц книги и осталось прочитать 240 страниц. Сколько страниц в книге?

Solution

To find the total number of pages in the book, we can set up a proportion using the information given. Let's denote the total number of pages in the book as 'x'.

According to the problem, Tanya has read 70% of the book, which can be expressed as 70/100 or 0.7 in decimal form. The remaining pages to be read are given as 240.

We can set up the following proportion:

(0.7 * x) = 240

To solve for 'x', we can divide both sides of the equation by 0.7:

x = 240 / 0.7

Evaluating the expression, we find:

x ≈ 342.857

Therefore, the book has approximately 342 pages.

Note: It's important to note that the solution provided is an approximation since the number of pages in a book is typically a whole number. However, since the problem statement does not specify whether the number of pages should be a whole number, we have provided the solution as a decimal approximation.

Answer

The book has approximately 342 pages.