Fanny read
17 of the encyclopedia. If she had read another 30 pages, she would have read
67 of the whole encyclopedia altogether. How many pages were there in the encyclopedia?
|
Read |
Not read |
Total |
Before |
1x1 = 1 u |
6x1 = 6 u |
7x1 = 7 u |
Change |
+ 30 |
- 30 |
|
After |
6x1 = 6 u |
1x1 = 1 u |
7x1 = 7 u |
The total number of pages remains unchanged. Make the total number of pages the same. LCM of 7 and 7 is 7.
Number of additional pages that Fanny would have read
= 6 u - 1 u
= 5 u
5 u = 30
1 u = 30 ÷ 5 = 6
Number of pages in the encyclopedia
= 7 u
= 7 x 6
= 42
Answer(s): 42