To do a certain work, the ratio of efficiencies of A and B is 3 : 7, w – McqOptions

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1.	To do a certain work, the ratio of efficiencies of A and B is 3 : 7, working together, they can complete a work in 14 days. B started the work and after working for 8 days. He left and A complete the remaining work. For how many days did A work?
A.	27
B.	30
C.	28
D.	24
Answer» D. 24

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