On Tuesday, Zane read
38 of a guide book. On Wednesday, he read 12 pages of the guide book. On Thursday, he read
47 of the remaining book leaving 57 pages unread.
- Find the number of pages read on Thursday.
- Find the total number of pages in the guide book.
(a)
Number of remaining unread pages after reading on Wednesday = 7 u
Number of remaining unread pages after reading on Thursday
= 7 u - 4 u
= 3 u
3 u = 57
1 u = 57 ÷ 3 = 19
Number of pages that Zane read on Thursday
= 4 u
= 4 x 19
= 76
(b)
Working backwards.
Number of pages unread after reading on Wednesday
= 7 u
= 7 x 19
= 133
Total number of pages in the guide book = 8 p
Number of pages unread after reading on Tuesday
= 8 p - 3 p
= 5 p
5 p = 12 + 133
5 p = 145
1 p = 145 ÷ 5 = 29
Total number of pages in the guide book
= 8 p
= 8 x 29
= 232
Answer(s): (a) 76; (b) 232