A and B can do a job a lone in 10 days and 12 days respectively .A started the work and after 6 days B also join to finish the work together .For how many days B actually worked on the job?
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0
Answer:
B also doing jobs 7days
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1
Answer:
B will finish his work in same 12 days because they work alone not together that's why no one can help each other
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