Question 1158064
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Cara works twice as fast as Jim.<br>
So when working together, Cara does 2/3 of the job and Jim does 1/3.<br>
Working together it takes the two of them 2 hours to do the job.<br>
So in 2 hours Cara completes 2/3 of the job.<br>
So it will take her 3 hours to complete the whole job alone.<br>