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Physics, 02.12.2019 18:51

Aconcrete pump of 120-cy/hr max. output is used to place 250 cy of concrete. it is supplied by 8 cy transit-mix trucks arriving to the site every 15 mins. barring interruptions how many hours will the operation require, considering 80% efficiency factor?

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Aconcrete pump of 120-cy/hr max. output is used to place 250 cy of concrete. it is supplied by 8 cy...
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