'A' can do a work in 50 days and ' B ' can do the same work in 20 days. They work together for ' 4 ' days and then 'A' leaves the work. In how many days will ' B ' finish the work ?

'A' can do a work in 50 days and ' B ' can do the same work in 20 d

1.	'A' can do a work in 50 days and ' B ' can do the same work in 20 days. They work together for ' 4 ' days and then 'A' leaves the work. In how many days will ' B ' finish the work ?
A.	14 2/5 days
B.	15 2/5 days
C.	16 2/5 days
D.	17 2/5 days
Answer» B. 15 2/5 days

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'A' can do a work in 50 days and ' B ' can do the same work in 20 days. They work together for ' 4 ' days and then 'A' leaves the work. In how many days will ' B ' finish the work ?

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