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Mathematics, 19.07.2019 12:00 whitakers87

Apassenger elevator in the sears tower in chicago can lift people 960 feet in 1 minute and 30 seconds. how fast must the freight elevator be traveling if it lifts cargo the same height but in 2 minutes and 30 seconds

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Apassenger elevator in the sears tower in chicago can lift people 960 feet in 1 minute and 30 second...
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