A can do a work in 6 days. B takes 12 days, C takes as long as A and B would take working

A can do a work in 6 days. B takes 12 days, C takes as long as A and B would take working together. How long will it B and C to complete the work together?
(a) 8 days
(b) 3 days
(c) 4 days
(d) None of these

Anurag Mishra Professor Asked on 13th March 2016 in Maths.
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    Answer: (b) 3 days 

    Anurag Mishra Professor Answered on 13th March 2016.
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