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Mathematics, 26.06.2020 22:01 Esme1995

a passenger elevator in the sears town 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 no

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a passenger elevator in the sears town in chicago can lift people 960 feet in 1 minute and 30 second...
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