Question

За один день коля прочитал 60% книги второй 7 девятых(дробь) остатка за 3 остальные 8стр.Сколько стр в книге

Answer 1

1) 100-60=40%- остаток
40%-0,4=4/10(дробь)
2) 4/10•7/9=14/45 - прочитал Коля за 2-ой день
3)6/10+14/45=54/90+28/90=82/90=41/45 за 2 дня вместе
4)1-41/45=4/45 прочитал Коля за 3-ий день
5)8:4•45=90 - всего страниц
Ответ: 90 страниц.


вроде так))

Answer 2

I can help you with your math problem. Let me explain how to solve it.

Let x be the number of pages in the book. Then, the first day Kolya read 0.6x pages. The second day, he read 7/9 of the remaining pages, which is 7/9 * (0.4x) = 0.28x pages. The third day, he read 8 pages. So, the total number of pages he read is:

$$0.6x + 0.28x + 8 = 0.88x + 8$$

To find x, we need to solve this equation for x:

$$0.88x + 8 = x$$

Subtracting 0.88x from both sides, we get:

$$8 = 0.12x$$

Dividing both sides by 0.12, we get:

$$x = 8 / 0.12 = 66.67$$

Therefore, the book has 66.67 pages. However, since the number of pages must be a whole number, we can round it up to 67 pages. This is the final answer.Ответь+подробно.+За+один+день+коля+прочитал+60%+книги+второй+7+девятых(дробь)+остатка+за+3+остальные+8стр.Сколько+стр+в+книге