'A' and ' B ' can do a work in 20 and 30 days respectively. They began the work together, but 'A left after some time and ' B ' finished the remaining work in 5 days. Then what is the number of days a

'A' and ' B ' can do a work in 20 and 30 days respectively. They be

1.	'A' and ' B ' can do a work in 20 and 30 days respectively. They began the work together, but 'A left after some time and ' B ' finished the remaining work in 5 days. Then what is the number of days a
A.	8 days
B.	10 days
C.	12 days
D.	14 days
Answer» C. 12 days

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'A' and ' B ' can do a work in 20 and 30 days respectively. They began the work together, but 'A left after some time and ' B ' finished the remaining work in 5 days. Then what is the number of days a

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