A work is done by three person A,B and C. A alone takes 10 hours to co – McqOptions

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1.	A work is done by three person A,B and C. A alone takes 10 hours to complete a single product but B and C working together takes 4 hours, for the completion of the same product. If all of them worked together and completed 14 products, then how many hours have they worked?
A.	20 hrs
B.	28 hrs
C.	40 hrs
D.	54 hrs
Answer» D. 54 hrs

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