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Mathematics, 14.04.2021 17:30 Gabriel134

Para la construcción del primer túnel en una mina se emplean 7 obreros, ellos en 21 días cavan 49 metros. En la construcción del segundo túnel hay 14 obreros trabajando al mismo ritmo que los del primer túnel, si ellos trabajan durante 42 días entonces la cantidad de metros de túnel que cavan es

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