Emily was attempting to read a book within a week. On Monday, she had read
37 of the book. By Friday, she had read another 396 pages and the ratio of the number of pages read to the total number of pages was 9 : 10. Find the average number of pages Emily should have read each day to complete the book in a week.
|
Read |
Unread |
Total |
Monday |
3x10 = 30 u |
4x10 = 40 u |
7x10 = 70 u |
Change |
+ 396 |
- 396 |
|
Friday |
9x7 = 63 u |
1x7 = 7 u |
10x7 = 70 u |
Number of pages that Emily read
= 63 u - 30 u
= 33 u
33 u = 396
1 u = 396 ÷ 33 = 12
Total number of pages
= 70 u
= 70 x 12
= 840
Average number of pages to read per day
= 840 ÷ 7
= 120
Answer(s): 120