Zoe read
18 of the manual. If she had read another 351 pages, she would have read
45 of the whole manual altogether. How many pages were there in the manual?
|
Read |
Not read |
Total |
Before |
1x5 = 5 u |
7x5 = 35 u |
8x5 = 40 u |
Change |
+ 351 |
- 351 |
|
After |
4x8 = 32 u |
1x8 = 8 u |
5x8 = 40 u |
The total number of pages remains unchanged. Make the total number of pages the same. LCM of 8 and 5 is 40.
Number of additional pages that Zoe would have read
= 32 u - 5 u
= 27 u
27 u = 351
1 u = 351 ÷ 27 = 13
Number of pages in the manual
= 40 u
= 40 x 13
= 520
Answer(s): 520