If 'A' can do a work in 20 days and ' B ' can do the same work in 30 days, how many days will it take when both 'A' and ' B ' work together ?

If 'A' can do a work in 20 days and ' B ' can do the same work in 3

1.	If 'A' can do a work in 20 days and ' B ' can do the same work in 30 days, how many days will it take when both 'A' and ' B ' work together ?
A.	10 days
B.	12 days
C.	14 days
D.	16 days
Answer» C. 14 days

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If 'A' can do a work in 20 days and ' B ' can do the same work in 30 days, how many days will it take when both 'A' and ' B ' work together ?

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