Shryia read a book cover to cover in a single session, at a constant rate. After reading for 1.5 hours, 5 hours, she had 402 out of the total 480 pages left to read.
Let y represent the number of pages left to read after x hours.
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After reading for 1.5 hrs Shryia had 402 Pages left to read out of 480 Pages
Pages Shryia had read in 1.5 hrs = Total Pages in book - Pages left to Read
=> Pages Shryia had read in 1.5 hrs = 480 - 402 Pages
=> Pages Shryia had read in 1.5 hrs = 78 Pages
=> Pages Shryia had read in 1 hrs = 78/1.5 = 52 Pages
Rate of Reading of Shryia = 52 Pages / hr
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