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OpenStudy (anonymous):
Bob can wash the truck in 45 minutes. With Janet working alongside, the two can wash the car in 30 minutes. How long would it take Janet to wash the car by herself?
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OpenStudy (anonymous):
When Bob washes the truck with Janet it takes him 30/45 (which simplifies to (2/3) of the time. Janet saves bob 15 minutes by helping. This means that 2/3 of janet's original time would equal 15 minutes. (2/3)x=15. So x=22.5
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