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 to together for 6 days, after whch 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.	40
C.	35
D.	30
Answer» C. 35

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