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29 November, 00:07

Thelma and georgia are shopping in the city. thelma leaves for home in her car at 4:00 traveling at 54 miles per hour, but georgia doesn't leave until 4:10. if she drives at 64 miles per hour, how long after she leaves does she catch up with thelma?

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  1. 29 November, 00:22
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    So from 4.00-4.10 10minutes has passed and thelma would have travelled 10/60*54 = 9 miles. In 1 hour, georgia would have travelled 10 miles more than thelma, hence in 9/10 hours she would catch up with thelma.

    9/10 * 60 = 54 minutes. hence the ans is 54 minutes or 9/10 hours
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