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Xiao Lin spent five days to finish reading a 70-page book. On average, how much of the book did he read every day? How much of this book did he read in three days?

2024-09-14 19:57
1 answer
2024-09-14 20:29

Kobayashi spent five days to finish reading a 70-page book. On average, he would read the book every day (page count/days)×(days/2)= (70/5)×(5/2)=14 pages/day. 3 days to read this book (page count/day count)×(day count/2)= (70/3)×(3/2)=20 pages/day.

A book has 36 pages. Xiao Ming finished reading it in 9 days. On average, how much does he read every day?

1 answer
2024-09-14 19:54

A book has 36 pages. Xiaoming needs 9 days to finish reading it. So, the average number of pages that Xiaoming reads every day is: 36 pages/9 days = 34 pages/day Therefore, Xiao Ming read an average of 34 pages of this book every day.

A book has a total of 95 pages. Dongdong wants to finish reading it in five days. How much of the book does Dongdong read every day? How much does Dongdong read on average every day?

1 answer
2024-09-10 07:16

A book has a total of 95 pages. I want to finish reading it in five days. I read a few parts of the book every day. How much do I read every day? Assuming that Dongdong reads x pages of the book every day, the total number of pages of the book in five days is 95x. Therefore, x can be solved using the following equation: 5x = 95x Solution:x = 95 Therefore, Dongdong read 95 pages of the book every day. 95/5=19 pages.

Xiao Wang reads a 500-page novel. He reads 1 page more every day than the day before. He pretends to finish reading the book in 15 days. How much did he read on the last day?

1 answer
2024-09-15 06:09

Xiao Wang reads a 500-page novel. He reads 1 page more every day than the day before for 15 days. How many pages did he read on the last day? Reading an extra page every day meant that Little Wang could read 500 pages + 1 page = 501 pages every day. He read for a total of 15 days, so the total number of pages Little Wang read was 500 pages x 15 days = 7500 pages. The number of pages he read on the last day was 7500 - 501 = 7099.

Xiao Gang finished reading the book in 7 days, and on average, he read this book in ( )5 days per day.

1 answer
2024-09-09 03:05

Xiao Gang finished reading a book in seven days, and he read an average of ( 7/14)% of the book every day. After reading this book in 5 days, you can use the product of proportions to calculate: ( 7/14)% × 5 = 7/72 Therefore, the ratio of Xiao Gang reading the book in 5 days was 7/72, which was about 01176 or 1176%.

Little Ming read a book. After seven days, there was still a quarter of the book left. In the next five days, he read a total of 120 pages, just enough to finish it. How much did Little Ming read on average every day?

1 answer
2024-09-13 12:36

假设这本书有 $n$ 页小明读了 $x$ 天。 根据题意小明读了 $x$ 天后这本书还剩下 $1/4$ 于全书的比例即 $\frac{1}{4}n = \frac{1}{4}x(n-x)$。 接下来小明读了 $x+7$ 天后这本书还剩下 $1/4$ 于全书的比例即 $\frac{1}{4}x(n-x) + \frac{1}{4}x^2 + \frac{1}{4}x^3 + \frac{1}{4}x^4 + \frac{1}{4}x^5 = \frac{1}{4}n$。 化简得到 $x^5 - 4x^4 + 3x^3 - 12x^2 + 25x - 4n = 0$。 这是一个由 $5$ 个方程组成的线性方程组可以通过特征值或特征方程的方法求解。 特征值计算如下: 设 $a_1 = 1$$a_2 = -2$$a_3 = -3$$a_4 = -5$$a_5 = -1$则特征方程为 $a_1^5 + a_2^4 + a_3^3 + a_4^2 + a_5^1 = 0$。 解得 $a_1 = 1$$a_2 = -2$$a_3 = -3$$a_4 = -5$$a_5 = -1$因此 $x = (-2 + 3i)(-3 + 5i)(-5 + 1i) = 3$即小明读了 $3$ 天。 因此小明读这本书平均每天读 $3$ 页。

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?

1 answer
2024-09-14 19:45

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.

Ming has a 170-page book. He read 80 pages in the first 4 days. If he wants to finish reading it in a week, how much should he read every day from the fifth day?

1 answer
2024-09-10 12:30

Ming has a 170-page book. He read 80 pages in the first 4 days. If he wants to finish it in a week, how many pages will he read every day from the 5th day onwards? From the 5th day onwards, read x pages every day, where x represents the number of pages that the nickname reads every day from the 5th day onwards. Reading 170 pages a day required 170 pages divided by 5 days = 34 pages per day. Therefore, from the fifth day onwards, Ming Xiao needed to read 34 pages a day.

He clearly planned to finish reading an extra-cursory book in seven days. What was the unit of how much he read every day?

1 answer
2024-09-09 03:48

If he wanted to finish an extra-cursory book in seven days, he would probably finish the book in " pages " or " chapters " every day.

How many pages does Xiao Jun have in a book? He read 37 pages a day for the first three days and 99 pages a day for the next four days. How much is the average page?

1 answer
2024-09-14 20:02

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Xiao Ya planned to finish reading a book in 20 days and read 15 pages a day. If he read five more pages a day, how many days would he be able to finish it?

1 answer
2024-09-16 12:42

If he read five more pages per day, the total number of pages per day would be 15 * 5/5 = 30 pages. The total number of pages that Xiao Ya needed to read in 20 days was 30 * 20 = 600 pages. If you read 15 pages a day, the total number of pages you need to read is 600 * 15/15 = 600 pages. Therefore, if you read five more pages a day, you can finish the book faster. The answer was: Ya-chan could finish the book in 15 days. She could read five more pages a day, and a total of 30 more pages, so she only needed 20-15=5 days to finish it.

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