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?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.
A storybook had 250 pages, and Xiao Ming read 15 pages a day. Could he finish it in two weeks?A 250-page storybook could be finished in two weeks if Xiaoming read 15 pages a day.
The calculation process was as follows:
First week:
In the first week, Xiaoming needed to read 6 days to finish 15 pages/day * 6 days = 90 pages.
Second week:
Little Ming needed to spend another 5 days to finish reading the remaining 90 pages of the storybook.
The total time required is:2 weeks * 2 = 4 weeks
Therefore, Xiaoming needed four weeks to finish reading a 250-page storybook.
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?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.