Mathematics, 28.01.2020 03:31, jameslinimk

Two cranes can unload a ship together in 4 hours. the faster crane takes 6 hours less than the slower crane, if each were to unload the same ship alone. how long does it take for each crane to unload this ship?

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Two cranes can unload a ship together in 4 hours. the faster crane takes 6 hours less than the slowe...