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OpenStudy (anonymous):

Two planes leave O'Hare airport in chicago at the same time. One flies directly east at 540 miles per hour. The other flies directly west at 720 miles per hour. How long will it take them to be 1890 miles apart? plz help!

OpenStudy (anonymous):

in one hour they would be 1260 miles apart... so in half hour 630... so in one and half hour they would b 1890 apart...

OpenStudy (anonymous):

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