Cathy read
18 of the manual. If she had read another 372 pages, she would have read
59 of the whole manual altogether. How many pages were there in the manual?
|
Read |
Not read |
Total |
Before |
1x9 = 9 u |
7x9 = 63 u |
8x9 = 72 u |
Change |
+ 372 |
- 372 |
|
After |
5x8 = 40 u |
4x8 = 32 u |
9x8 = 72 u |
The total number of pages remains unchanged. Make the total number of pages the same. LCM of 8 and 9 is 72.
Number of additional pages that Cathy would have read
= 40 u - 9 u
= 31 u
31 u = 372
1 u = 372 ÷ 31 = 12
Number of pages in the manual
= 72 u
= 72 x 12
= 864
Answer(s): 864