<PRE><B>Question 290965</B>
Brett usually takes 50 minutes to groom the horses. 
Brett rate = 1/50 job/min
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After working 10 minutes, he was joined by Angela and they finished the grooming in 15 minutes.
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Brett worked a total of 25 minutes at (1/50) job/min
He completed 25(1/50) = 1/2 of the job.
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So Angela does the other half of the job in 15 minutes.
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How long would it have taken Angela working alone?
Angela could do the whole job in 30 minutes.
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Cheers,
Stan H.
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