A takes 10 hours to do a work. B takes 12 hours to do the same works. In how many hours A & B working together will complete the work?

A takes 10 hours to do a work. B takes 12 hours to do the same work

1.	A takes 10 hours to do a work. B takes 12 hours to do the same works. In how many hours A & B working together will complete the work?
A.	12/3
B.	60/11
C.	60/7
D.	10/5
Answer» C. 60/7

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A takes 10 hours to do a work. B takes 12 hours to do the same works. In how many hours A & B working together will complete the work?

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