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31 March, 15:46

If Sarah reads at an average rate of 21 pages in four nights, how long will it take her to read 140 pages?

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  1. 31 March, 18:02
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    26 2/3 nights

    Step-by-step explanation:

    You can use a proportion.

    21 pages is to 4 nights as 140 pages is to x nights

    21/4 = 140/x

    21x = 4 * 140

    3x = 4 * 20

    3x = 80

    x = 80/3 = 26 2/3
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