A can do a piece of work n 7 days of 9 hours each and B alone can do i – McqOptions

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1.	A can do a piece of work n 7 days of 9 hours each and B alone can do it in 6 days of 7 hours each. How long will they take to do it working together 8 2/5 hours a day?
A.	3
B.	4
C.	5
D.	6
Answer» B. 4

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