Jean read
15 of the book. If she had read another 135 pages, she would have read
78 of the whole book altogether. How many pages were there in the book?
|
Read |
Not read |
Total |
Before |
1x8 = 8 u |
4x8 = 32 u |
5x8 = 40 u |
Change |
+ 135 |
- 135 |
|
After |
7x5 = 35 u |
1x5 = 5 u |
8x5 = 40 u |
The total number of pages remains unchanged. Make the total number of pages the same. LCM of 5 and 8 is 40.
Number of additional pages that Jean would have read
= 35 u - 8 u
= 27 u
27 u = 135
1 u = 135 ÷ 27 = 5
Number of pages in the book
= 40 u
= 40 x 5
= 200
Answer(s): 200