Question

Андрей прочитал книгу за 2дня Во второй день он прочитал 1/3 того,что он прочитал в первы день.Сколько страниц он прочитал во второй день,если во всей книге 80 страниц? Помогите пожалуйста

Answer 1

Пусть в первый день он прочитал х страниц, тогда во второй он прочитал х*1/3
х+1/3х=80
х4/3=80
х=80*3/4
х=60
прочитал в первый день 60 стр.
во второй 1/3 от 60 =20
20+60=80

Answer 2

Calculation of Pages Read on the Second Day

To calculate the number of pages Andrey read on the second day, we need to determine the total number of pages he read on the first day and then calculate one-third of that amount.

Given: - Andrey read the entire book in 2 days. - On the second day, he read one-third of what he read on the first day. - The book has a total of 80 pages.

Let's break down the calculation step by step:

1. Determine the number of pages Andrey read on the first day. - Let's assume the number of pages he read on the first day is x. - According to the given information, on the second day, he read one-third of what he read on the first day. So, on the second day, he read (1/3)x pages. - The total number of pages in the book is 80. - Therefore, the number of pages he read on the first day can be calculated as: x + (1/3)x = 80.

2. Solve the equation to find the value of x. - Combine like terms: (4/3)x = 80. - Multiply both sides of the equation by 3/4 to isolate x: x = (80 * 3/4). - Simplify: x = 60.

3. Calculate the number of pages Andrey read on the second day. - We know that on the second day, he read one-third of what he read on the first day. - Substitute the value of x into the equation: (1/3) * 60 = 20.

Therefore, Andrey read 20 pages on the second day.

Answer:

Andrey read 20 pages on the second day if the entire book has 80 pages.