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486 . Ronald and Elan are working on an assignment .Ronald takes 6 hours to type 32 pages on a computer,while Elan takes 5 hours to type 40 page.How much time will they take,working together on two differen
A. 7 hour 30 minutes B. 8 hours
C. 8 hours 15 minutes D. 8 hours 25 minutes




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