A girl read 2/7th of the book on one day and 4/5th of the remainders on another day. If ther were 35 pages unread, how many pages did the book contain?
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total pages in the book =x
2/7 of x pages =2/7x
Remaining =x-2x/7
=7x-2x/7
=5x/7
Now 4/5 of remaining =(5x/7) X(4/5)
=20x/35
Unread pages=(5x/7)-(20x/35)
This will be equal to 35
5x/35=35
5x=35x35
X=35x7
X=245
Total pages =245
Verification
2/7 of 245=70
Unread remaining =245-70
=175
4/5 of 175=140
Unread pages =175-140
=35
Verified
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