Gem was attempting to read a book within a week. On Monday, she had read
15 of the book. By Friday, she had read another 49 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 Gem should have read each day to complete the book in a week.
|
Read |
Unread |
Total |
Monday |
1x2 = 2 u |
4x2 = 8 u |
5x2 = 10 u |
Change |
+ 49 |
- 49 |
|
Friday |
9x1 = 9 u |
1x1 = 1 u |
10x1 = 10 u |
Number of pages that Gem read
= 9 u - 2 u
= 7 u
7 u = 49
1 u = 49 ÷ 7 = 7
Total number of pages
= 10 u
= 10 x 7
= 70
Average number of pages to read per day
= 70 ÷ 7
= 10
Answer(s): 10