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1 May, 11:49

For a read-a-thon, Jay and Odhràn each started reading a book at the same time and continued reading for several hours. Jay's book had 278 pages, and he read 55 pages per hour. Odhràn's book had 238 pages, and he read 45 pages per hour. After how many hours did they have the same number of pages left, and how many pages were left?

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  1. 1 May, 14:15
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    Answer: 4 hours

    Step-by-step explanation:

    Let after x hours both have equal number of left pages.

    Since, Jay's book had 278 pages, and he read 55 pages per hour.

    Thus, after x hours the number of pages he read = 55 x

    ⇒ After x hours the pages he has left = 278 - 55x

    Similarly, Odhràn's book had 238 pages, and he read 45 pages per hour.

    ⇒ After x hours the pages he has left = 238 - 45x

    Therefore, we can write,

    278 - 55 x = 238 - 45 x

    ⇒ 278 - 55 x + 45 x = 238

    ⇒ 278 - 10 x = 238

    ⇒ - 10 x = 238 - 278

    ⇒ - 10 x = - 40

    ⇒ x = 4

    Hence, after 4 hours they have same number of pages left.
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