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masya89 [10]
4 years ago
14

Jane works 3 times as fast as Eleanor. If they work together they can do a job in 21 minutes. How long does it take Eleanor to d

o the job by herself?
Mathematics
2 answers:
erik [133]4 years ago
6 0

Answer:

Eleanor's work 1h 24'

Step-by-step explanation:

e-lub [12.9K]4 years ago
4 0

Answer:

1 hour and 24 min

Step-by-step explanation:

Jane does 3/4 job done in 21 min

Eleanor does 1/4 job done in 21 min

21*4=84

60+24

1 hour and 24 min

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