When Teacher Zhang reads a book, he reads an average of 20 pages a day for the first 4 days, and 63 pages in total for the next 7 days. He just finishes reading this book. How many pages does Teacher Zhang read on average every day?
Assuming that the book has a total of n pages, then Teacher Zhang has read 20×4=80 pages in the past four days, leaving n-80 pages. In the next 7 days, he read 63 pages, so the remaining pages were 63-80=-3 pages. This result is negative, which is not consistent with reality, so there is a contradiction in the hypothesis. Therefore, this problem is not solved. Teacher Zhang reads an average of 80 pages a day, but he has read 20 pages in the past four days, so he still needs to read another 40 pages to finish the book.
If Xiaoming reads a storybook, he reads 38 pages in the first 2 days and 54 pages in the next 3 days. How many pages does Xiaoming read on average every day?
Xiao Ming read a story book and read a total of 38 pages in the first two days and 54 pages in the next three days. We can use the total number of pages to deduct the number of pages in the first two days and the next three days to get the average number of pages that Xiaoming reads every day. Total pages = 38 + 54 = 82 In the previous two days, he had read 38 pages, so the ratio of the number of pages read in the previous two days to the total number of pages was 38 pages/ 82 pages = 047875, which could be approximately expressed as 047875. In the next three days, a total of 54 pages were read. The ratio of the number of pages read in the next three days to the total number of pages was 54 pages/ 82 pages = 06667, which could be approximately expressed as 06667. Therefore, on average, Xiaoming reads 047875 × 2 + 06667 × 3 = 016533 × 2 + 023333 × 3 = 039167 × 2 + 050938 × 3 = 089715 × 2 + 010785 × 3 = 1575 × 2 + 0192 × 3 = 27533 every day, which is about 275. Therefore, Xiao Ming read an average of 275 pages a day.
Xiaoming reads a storybook. For the first 4 days, he reads 25 pages a day. After that, he reads 40 pages a day. After 6 days, he just finishes reading. How many pages does Xiaoming read per day on average?
Xiaoming reads a storybook for the first 4 days, reads 25 pages a day, then reads 40 pages a day, and reads for 6 days, just finishing it. How many pages does Xiaoming read on average every day? The number of pages in the storybook was fixed. The number of pages read in the first four days was 25 x 4 = 100 pages, and the remaining pages were 100 - 6 x 25 = 35 pages. Therefore, Xiaoming reads an average of 35 pages a day.
Little Ming read a book. He read 15 pages in the first 4 days and 6 pages a day in the next 5 days. How many pages did he read on average every day?
Xiao Ming read a book for the first 4 days and read 15 pages, then read 6 pages every day for 5 days. We can use the following formula to calculate the average number of pages seen per day: Average number of pages read per day = total number of pages/days Substituting the total number of pages and the number of days into the formula, we get: Average number of pages read per day = 15 pages/4 days = 3 pages/day Therefore, Xiao Ming read an average of three pages a day.
Xiao Ming read a book. He read 72 pages in the first 4 days and 29 pages a day for the next 6 days. How many pages did he read on average every day?
If Xiaoming reads 72 pages in the first 4 days, then Xiaoming's total page count in the first 4 days is 72 pages. Reading 29 pages every day for the next 6 days would mean that the total number of pages for the next 6 days would be 29 pages x 6 days = 171 pages. Therefore, Little Ming's total page count in the last six days was 171 pages. Little Ming read 171 pages per day for the next 6 days, 6 days = 27 pages. Therefore, Xiao Ming read an average of 27 pages a day.
Naughty reads a book with a total of 170 pages. He has already read 90 pages. How many pages does he read on average every day?
Naughty had read 90% of the 170 pages of the book, which meant that Naughty had read 90/19=5267 pages. The average number of pages to read in the remaining four days can be calculated by dividing the total number of pages by the number of days. 170 pages/4 days =45 pages/day. So, on average, Piao Jiao would read 45 pages a day.
Wang Qiang read a book. For the first four days, he read eight pages a day, and for the next three days, he read a total of 17 pages. How many pages did he read on average every day?
Wang Qiang read a book for the first four days, eight pages a day, and then a total of 17 pages for the next three days. We can split this situation into two parts for analysis: Reading eight pages a day for the first four days meant that Wang Qiang had already read $4/times 8 = 32$pages in the first four days. Reading a total of 17 pages in the last 3 days meant that Wang Qiang had read another $3/17 = 54$page in the last 3 days. Therefore, Wang Qiang read a total of $32+54=86$pages. Next, we need to calculate how many pages he reads on average every day. Did he read all the books in the first four days and the last three days together? If that was the case, then the average number of pages he read every day was $86/4+17/3=265+5=315$pages. If not, then the average number of pages he read every day was $86/4-17/3=26-5=21$pages. Therefore, Wang Qiang read an average of 21 pages a day.
Sister reads a book in 3 days, reads 15 pages, and finishes reading 40 pages. How many days does it take?
Sister reads a book for three days and reads 15 pages every day. Therefore, she can read 15/60 = 025 pages per hour. If a book had 40 pages, then Sister would need to read 40 pages/025 pages/hour = 160 hours. Because her sister needed to watch for 160 hours, she needed 160 hours divided by 3 days = 56 hours. Therefore, her sister needed 56 hours to finish reading 40 pages of the book.
In a book, Xiaoming reads page a every day on average for 7 days. How many pages does he start reading on the eighth day?
In a book, Xiao Ming read page A for an average of seven days a day, so he read page 7A in total. Therefore, the number of pages to read on the eighth day should be: 8 days × a pages/day = 7a pages Adding the first 7 pages and the last 1 page gives: 8 + 7 = 15 days Because Xiao Ming had already read page 7a on the seventh day, the remaining pages should be: 15 days-page 7a = page 8a Therefore, Xiao Ming should start reading page 8a on the eighth day.
Xiao Ming reads a book. If he reads 15 pages a day, he will finish it in 24 days. If he reads 20 pages a day, how many days will he finish it?
If Xiao Ming reads 15 pages a day, the total number of pages he needs is: 15 pages/day x 24 days = 360 pages Therefore, Xiao Ming needed to read 360 pages to finish it in 24 days. The number of days required to read 20 pages a day is: 20 pages/day x days = 20 days Therefore, Xiao Ming needed to read for 20 days to finish the book.
If Little Ming reads a book, if he reads 15 pages a day, he will finish it in 24 days. If he reads 20 pages a day, how many days will he finish it?
If Xiao Ming reads a book every day for 15 pages and 24 days, then the book has a total of 15 * 24 = 360 pages. If I read 20 pages a day, how many days can I finish it? Assuming that the book has x pages, the total number of pages that Xiaoming needs to read is 20 * x days. Because Xiao Ming needed to read 360 pages, there were: 20 * x = 360 Solve this equation: x = 180 Therefore, Xiao Ming needed to read 180 pages to finish the book. If he read 20 pages a day, he would need 180 * 20 days = 3720 days to finish the book.