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rakesh read 2÷5 of a book on Thursday 1÷3 of the remaining on Friday and the rest 50 pages on Saturday. find the no of pages of the book ? |
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Answer» Let there be X pages in the book.Monday: She read ( 3/7 ) of the book or ( 3/7 )X pages. That is she has yet to read (1 - 3/7)X or= ( 4/7 )X pages.Tuesday: She read (1/ 4) of remainder or( 1/4 )*( X - (3/7)X ) or ( 1/4 ) * ( 4/7 ) * ( X ) or= ( X/7 ) (= AMOUNT read)This MEANS that because she has now read one QUARTER of the remainder, 9she has yet to read (3/4)*(4/7)X or (3/7)X pages.Wednesday onwards: 75 more pages to read.Therefore (3/7)X = 75 pagesTherefore X = ( 75 )*( 7 )/( 3 )Therefore X = 25 * 7 = 175 pages |
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