Naoya read a book cover to cover in a single session, at a rate of 55 pages per hour. after reading for 4 hours, he had 330 pages left to read.

how long is the book?

how long did it take naoya to read the entire book?

She reads at 55 pages per hour for 4 hours so 55*4 = 220 pages so far. This means that she read 220 and had 330 left so 220 + 330 = 550 so the book is 550 pages. If she reads 55 pages per hour and there is a total of 550 pages, 550/55 = 10 hours to read the book.

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