Mathematics, 05.11.2020 04:00 aylengarcia090

Mr. Williams can grade 50 essays in 7 hours. His assistant, Mr. Wilfred, can do the same job in 14 hours. His other assistant, Ms. Stealth, can grade 25 essays in 6 hours. How long will it take them to grade 200 essays if all three work together?

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Mr. Williams can grade 50 essays in 7 hours. His assistant, Mr. Wilfred, can do the same job in 14 h...