I read 3 by 8 of a book on one day and 4by5 of the remainder on another day if there were 30 pages unread how many pages for book contain?
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I read 3 by 8 of a book on one day and 4by5 of the remainder on another day if there were 30 pages unread how many pages for book contain?
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Step-by-step explanation:
part read in first day is 3/8
hence remainder on first day is
[tex]1 - \frac{3}{8} = \frac{5}{8} [/tex]
on the next day she read 4/5 of the remainder. that is
[tex] \frac{5}{8} \times \frac{4}{5} = \frac{1}{2} [/tex]
hence remainder after second day is
[tex]1 - \frac{1}{2} = \frac{1}{2} [/tex]
given that this is equal to 30
[tex] \frac{1}{2} = 30 \: pages[/tex]
hence total no of pages is 60