He had been reading a storybook for 16 pages a day, but after reading it for five days, he had left 60% untouched. How many pages was this storybook?

2024-09-16 18:03

1 answer

2024-09-16 18:12

He had read 16 pages of a storybook every day for five days, leaving 60% untouched. We can use the formula "book page number = total page number x page percentage" to solve this problem. The total page number is the number of pages that have been read plus the number of pages that have not been read, and the page percentage is the proportion of the number of pages that have not been read to the total number of pages. According to the question, he had read 16 × 5 = 80 pages in five days. The remaining number of pages was 60%, 36 pages. Therefore, the total number of pages in this storybook was 80 + 36 = 116 pages.

Zhang Ming was reading a storybook. He read 30 pages a day. After three days, there were still 8 pages of the book left. How many pages were there in this storybook?

1 answer

2024-09-16 18:02

Let's say this storybook has a total of $x$pages. According to the topic, 30 pages per day meant $30/div2 = 15$per hour. Zhang Ming read $15$pages per hour in $3$days so he read $3/30 = 90$pages in total. The remaining pages are $8/5 of the book, so there are: $$ 90 - \frac{8}{5} = \frac{16}{5} $$ Because the question requires the number of pages in the book, you need to multiply this result by $x$pages to get: $$ x \times \frac{16}{5} = \frac{16}{5} \times x = 96 $$ Solve this equation to get $x = 56$. So this story book had a total of $56$pages.

He had been reading a 350-page storybook for five days, and there were still 90 pages left. How many pages do you read on average every day?

1 answer

2024-09-16 10:55

He had been reading for five days and there were still 90 pages left, so he still needed to read 350 - 90 = 260 pages every day. Therefore, he read an average of 260 pages/5 = 52 pages a day.

A storybook had 600 pages, but he had read 130 pages in 5 days. At this speed, how could he finish reading it in 25 days?

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2024-09-20 11:01

At this rate, he could finish reading 600 pages in 25 days. However, due to the number of pages read each day, the specific reading time may vary. Assuming that the number of pages read per day is 130, then the number of pages that can be read in 25 days would be: 25 days x 130 pages/day = 3350 pages Therefore, he needed to spend 25 days to finish reading all 3350 pages of the story book. It is worth noting that this is only a hypothesis. The actual reading speed may be affected by many factors, such as the difficulty of reading, the number of pages read, the mood of reading, and so on.

Xiao Hua read a book and read 15 pages a day. After reading for 4 days, he still had 2/5 of the book left. How many pages of this storybook had he not read?

1 answer

2024-09-15 14:15

Assuming that this storybook had $x$pages, then the number of pages Little Light read every day was $15/div4 = 375$pages. Little Light had already read $4$for days, so the remaining pages were $x - 4/375 = x - 1125$. Because the number of pages Little Light reads every day is fixed, the number of pages can be expressed as: $$x - 4 \times 375 = 375 \times 4 - 1125$$ The above formula was simplified to: $$x = 48$$ Therefore, there were still $48 - 1125 = 3675 pages of this storybook that he had not read.

Little Ming was reading a storybook. He planned to read 12 pages a day, but he actually read 8 pages a day. In the end, he finished reading it two days earlier. How many pages is this storybook?

1 answer

2024-09-21 07:17

Xiao Ming planned to read 12 pages a day, but he actually finished reading 8 pages a day two days earlier. Assuming that this storybook has x pages: - The plan is to read x/12 days, which is x/12 pages. - Actually, x/8 days is x/8 pages. Because Little Ming finished reading it two days earlier, he only needed to read x/8 - x/12 = x/4 days. Because Xiao Ming reads 8 pages a day, he needs to read x/4 days x 8 pages = x 4/5 pages. Therefore, we can get the following equation: x/4 - x/12 = x/5 By solving this equation, one could obtain: x/12 = x/5 + 1/2 x/12 = (x+10)/5 x/12 = x/5 + 1/6 x/6 = 1/6 x = 1 Therefore, this storybook had one page.

A storybook has 252 pages. After reading it for 8 days, there are 12 pages left. How many pages do you read every day?

1 answer

2024-09-16 11:16

If a book has 252 pages and has been read for 8 days and there are 12 pages left, then the total number of pages in the book is 252 - 12 = 240 pages. The number of pages he read every day should be 240/8 = 30 pages. Therefore, you should read 30 pages a day.

A storybook, read an average of 15 pages a day. After reading for 12 days, the remaining pages are more than 2/7. How many pages are left?

1 answer

2024-09-16 11:12

There was a total of $12/15 - 1/15 = 165$pages left in the storybook. After reading the remaining two-sevenths, the remaining pages were two-sevenths of the original number. Therefore, he still needed to look at $165/div2/7 = 105$. Therefore, there were still 60 pages left.

Reading a storybook every day, 40 pages a day. After 3 days, there is still 5/8 of the Golden Book left. How many pages is this book?

1 answer

2024-09-16 18:03

Assuming the book has $x$pages: - $40$on the first day. - The next day, he read $40/times 2 = 80$pages. - On the third day, if you read $3/8$on $40$pages, you would read $10$pages. Because there was still $5/8 left, there was: $$ 40 + 80 + 10 = \boxed{120} $$ So this book has 120 pages.

There were 360 pages in a storybook. After reading for 3 days, Little Min had 234 pages left. How many pages did she read on average every day?

1 answer

2024-09-25 05:10

小敏读了3天还剩下234页那么她第一天读了 $\frac{234}{3}$ 页第二天读了 $\frac{234}{3} - \frac{1}{2}$ 页第三天读了 $\frac{234}{3} - \frac{1}{2} - \frac{1}{3}$ 页。将这些式子代入到 $360 - 234 = 126$ 页中得到小敏平均每天读了 $126 \div 3 = 4333$ 页。因为读书的时间需要连续所以小敏不能每天都读同一本书所以实际每天读的页数会稍微少一些。

How many pages are there in this storybook? If Xiao Qiang reads 20 pages a day, what if there are 15 pages left in the book after five days?

1 answer

2024-09-10 08:01

According to the question, Cockroach read 5 days *20 pages/day =100 pages, and the remaining 15 pages of the book are equal to the total number of pages-100 pages that have been read, so the total number of pages is: 100 pages +15 pages =115 pages. The answer was page 115.