A and b can do a piece of work in 12 days a alone can finish work in 20 days b can do works in how many days
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A and B together can do work W in 12 days.
Productivity of A and B together in one day : W /12 per day
A along can do work W in 20 days.
productivity of A in one day : W/20
Productivity of B in one day: W /12 - W /20 = W/30
So B alone can do the work W in W / (W /30) = 30 days.
Productivity of A and B together in one day : W /12 per day
A along can do work W in 20 days.
productivity of A in one day : W/20
Productivity of B in one day: W /12 - W /20 = W/30
So B alone can do the work W in W / (W /30) = 30 days.
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