A and B can separately do a piece of work in 20 and 15 days respective – McqOptions

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1.	A and B can separately do a piece of work in 20 and 15 days respectively. They worked together for 6 days, after which B was replaced by C. If the work was finished in next 4 days, then the number of days in which C alone could do the work will be ?
A.	60
B.	35
C.	40
D.	30
Answer» D. 30

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