A does half as much work as B in 3/4 th of time . If together they take 18 days to complete the work , how much time shall B take to do ?
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Step-by-step explanation:
A : B
Time 3 : 4
Eff. 1 : 2
We have to do time equal so,
A : B Time 3×4 : 4×3
Eff. 1×4 : 2×3
A : B
Time 12 : 12
Eff. 4 : 6
Both do the work in 18 days
So, Total work = (A+B)’s eff. × 18
= (4 + 6) × 18
= 180 units
= 180/6 = 30 Days
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