Question

Решите задачю В повести 150 страниц.Первые 5 дней ученик читал её по 18 страниц в день,а затем стал читать по 20 страниц в день.За сколько дней он прочитал эту повесть?

Answer 1

Problem Analysis

To solve this problem, we need to calculate the number of days it took for the student to read a 150-page book. The student initially read 18 pages per day for the first 5 days and then increased their reading speed to 20 pages per day. We'll calculate the number of days it took for the student to read the entire book.

Solution

Let's break down the problem step by step:

1. Calculate the number of pages read in the first 5 days: 5 days * 18 pages/day = 90 pages. 2. Calculate the remaining number of pages to be read: 150 pages - 90 pages = 60 pages. 3. Calculate the number of days required to read the remaining pages: 60 pages / 20 pages/day = 3 days.

Therefore, it took the student a total of 5 days + 3 days = 8 days to read the entire 150-page book.

Answer

The student read the 150-page book in 8 days.