A takes as much time as B and C together take to finish a job. A and B working together finish the job in 10 days. C alone can do the job in 15 days. In how many days can B alone do the same job?
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Step-by-step explanation:
A + B + C can do in 1/10 + 1/15= (3+2)/30= 5/30 th work per day , that means they all can finish in 6 days
B+C =A
2*A can do in 6 days
A alone can do in 12 days
A+B in 10 days
B in one day is 1/10–1/12=(6–5)/60=1/60
So B alone do the work in 60 days
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