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26 December, 23:10

One carpenter builds 1/5 of a house in 3/4 of a day and the other builds 2/5 of a house in the same amount of time. How many houses do the two carpenters build in total per day?

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  1. 26 December, 23:55
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    4/5 houses

    Explanation:

    The speed of the first carpenter is:

    (1/5 house) / (3/4 day) = 4/15 house/day

    The speed of the second carpenter is:

    (2/5 house) / (3/4 day) = 8/15 house/day

    Together, their combined speed is:

    4/15 house/day + 8/15 house/day = 12/15 house/day

    = 4/5 house/day

    Per day, the two carpenters build 4/5 of a house.
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