Question

Андрей в первый день прочитал 30% всей книги, во второй день-25%, в третий день-остальные 180страниц.Сколько страниц прочитал Андрей в первый день? Ответьте плиззз

Answer 1

1)25+30=55(%)в 1 и во 2 день
2)100-55=45(%)в 3 день
3)180÷45=4(стр)1%
4)4×30=120(стр)
ответ 120 стр

Answer 2

1 день - 30%
2 день - 25%
3 день - 180 стр.

1) 100-(30+25)=45(%)-3 день
45%=180 страниц
2) 180:45=4(стр)-1%
3) 4*30=120 (стр)
Ответ: 120 страниц

Answer 3

Calculation of Pages Read by Andrei on the First Day

To calculate the number of pages Andrei read on the first day, we need to determine the total number of pages in the book and the percentage of the book he read on each day.

Let's assume the total number of pages in the book is represented by "P".

According to the given information: - On the first day, Andrei read 30% of the entire book. - On the second day, he read 25% of the entire book. - On the third day, he read the remaining 180 pages.

To find the number of pages Andrei read on the first day, we can set up the following equation:

30% of P + 25% of P + 180 = P

Simplifying the equation, we have:

0.3P + 0.25P + 180 = P

Combining like terms, we get:

0.55P + 180 = P

Subtracting 0.55P from both sides, we have:

180 = 0.45P

Dividing both sides by 0.45, we get:

P = 180 / 0.45

Solving this equation, we find that the total number of pages in the book is 400.

Now, we can calculate the number of pages Andrei read on the first day:

30% of 400 = 0.3 * 400 = 120 pages.

Therefore, Andrei read 120 pages on the first day.