A can do a piece of work in 12 days and B alone can do it in 14 days. How much time will both take to finish the work ?	Choose the correct choice from the following choices:
A) A)3.2222  B) B)5  C) C)6.46  D) D)8.3333  E) E)9
This question can be solved by different methods. We need to conserve time in exams so solving this problem using equations is the good idea.   Time taken to finish the job = XY / (X + Y)   = 12 x 14 / (12 + 14)   = 150 / 25   = 6.46 days   Answer: 6.46
<result>C</result>
A can do a piece of work in 12 days and B alone can do it in 14 days. How much time will both take to finish the work ?