A and B can together finish a work in 30 days. They worked together for 20 days and then B left. After another 20 days. A finished the remaining work. The number of days in which B alone can finish th

 A and B can together finish a work in 30 days. They worked together for 20 days and then B left. After another 20 days. A finished the remaining work. The number of days in which B alone can finish th

A). 50

B). 48

C). 54

D). 60

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