If Mao Mao reads a book and reads 30 pages a day, he can finish it in 8 days. If he reads 40 pages a day, how many days can he finish it in advance? Use the ratio method to answer
Mao Mao reads a book and reads 30 pages a day in 8 days. Therefore, the total number of pages in this book is 30 × 8 = 240 pages. If I read 40 pages a day, how many days can I finish it in advance? Using the ratio method to answer: To calculate the number of days you can read 40 pages a day compared to 30 pages a day, you can use the ratio method: Reading 40 pages a day was 40 - 30 = 10 pages more than reading 30 pages a day. Therefore, the number of days required to finish reading this book was 240 pages/10 pages/day = 240 days. Substituting this result into the original formula: 8 days/240 days = 0037125, which meant that reading 30 pages a day was about 37125 days earlier than reading 40 pages a day. Therefore, by reading 40 pages a day, he could advance by 0.037125 + 37125 = 47125 days. The answer was about four days in advance.
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 Hong reads a children's novel and reads 12 pages a day, she can finish it in 10 days. If she reads 15 pages a day, how many days will she finish it?
If Xiao Hong reads a children's novel and reads 12 pages a day and can finish it in 10 days, then the number of pages in this novel is: 12 pages/day x 10 days = 120 pages If I read 15 pages a day, how many days would it take to finish it? 15 pages/day x days = 150 pages To determine the total number of pages in this novel, we need to divide 120 pages by the total number of pages we read every day, 15 pages, to get: 120 pages/15 pages/day = 8 days Therefore, Little Red needed eight days to finish reading the same children's novel, which was 15 pages a day.
If Xiao Qiang reads a literary masterpiece, if he reads 20 pages a day, he can finish it in 18 days. If he reads 5 pages less a day, how many days can he finish it?
If you read 20 pages a day, you can read one literary masterpiece in 18 days, which is an average of 217 books per month. If you read five pages less a day, then it would take 10 days to read 15 pages a day, and it would take another 7 days to read 20 pages in 18 days.
Xiao Xin reads a book, reads 12 pages a day, and after 5 days, there is still 40% of the book left. How many pages is this book?
Assuming the book has a total of $x$pages: - How many days did Xiao Xin read the $12$page every day? - Xiao Xin has read $5$for days and has $40 $left. This means that there are still $(40/100)/times 12$pages left. - This book has a total of $x$pages, so there are: $$ 12\times 5 + (40/100)\times 12 = x $$ Solve the equation: $$ x = 80 $$ So the book had a total of $80$pages.
If Xiaoming reads a novel and reads 35 pages a day, he will finish the book one day later than the stipulated date. If he reads 40 pages a day, he will read 5 pages less on the last day…
Xiao Ming reads a novel. If he reads 35 pages a day, he will finish the whole book one day later than the stipulated date. If he reads 40 pages a day, he will read 5 pages less on the last day. We can set the total number of pages of the novel as x and the specified date as d, then the total number of pages that Xiaoming needs to read is x/35 + x/40 - 1. According to the question, Xiaoming needs to read d books, so there are: x/35 + x/40 - 1 = d Transferring the terms of the equation gave: x/100 = d Therefore, Xiao Ming needed to read 100 pages a day to finish the novel by the stipulated date. If you read 35 pages a day, you would need an extra two days to finish the novel. If you read 40 pages a day, you would need an extra three days to finish the novel. After considering all, Xiaoming needed to read 37 pages a day to finish the novel according to the stipulated date. On the last day, he had to read 5 pages less.
Xiao Ming reads a book. He reads 1/13 of the book every day. After 4 days, there are 90 pages left. How many pages are there in this book?
Assuming that the book has $x$pages, the number of pages that Xiaoming reads on the fourth day is $x$multiplied by $1/13$. Because Xiao Ming had read for 4 days, the number of pages he read plus the remaining pages equals the total number of pages: $$ x + (x \times 1/13) + 90 = x $$ To simplify it: $$ x \times 12 - x \times 1/13 + 90 = 0 $$ Solve this equation: $$ x = 130 $$ Therefore, the book had a total of 130 pages.
Xiao Ming reads a book, reads 15 pages a day, and after 4 days, there are still 3/5 of the book left unread. How many pages is this book?
Assuming that this book has $n$pages, Xiaoming reads $x$pages every day: $$ 4\times 15 = 3/5 \times n $$ The solution is $n = 50$. So this book has 50 pages.
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.
Xiaoming reads a book with 600 pages, planning to finish it in 10 days. In fact, he reads 30 pages less than planned every day. How long does Xiaoming actually take to finish it?
Xiao Ming read a book with 600 pages and planned to finish it in 10 days, so his daily reading plan was 600/10 = 60 pages. In fact, he read 30 pages less than he planned, so the number of pages that Xiaoming actually needed to read every day was 60 - 30 = 30 pages. Therefore, the number of days Xiaoming actually needed to read was 60 pages/30 pages/day = 2 days. Therefore, Little Ming actually needed two days to finish reading this book.