Xuan was attempting to read a book within a week. On Monday, she had read
15 of the book. By Friday, she had read another 238 pages and the ratio of the number of pages read to the total number of pages was 9 : 11. Find the average number of pages Xuan should have read each day to complete the book in a week.
|
Read |
Unread |
Total |
Monday |
1x11 = 11 u |
4x11 = 44 u |
5x11 = 55 u |
Change |
+ 238 |
- 238 |
|
Friday |
9x5 = 45 u |
2x5 = 10 u |
11x5 = 55 u |
Number of pages that Xuan read
= 45 u - 11 u
= 34 u
34 u = 238
1 u = 238 ÷ 34 = 7
Total number of pages
= 55 u
= 55 x 7
= 385
Average number of pages to read per day
= 385 ÷ 7
= 55
Answer(s): 55