A) 27 days
B) 28 days
C) 30 days
D) 31 days
Correct Answer: A
Solution :
(a): Let A finish work in 'x' days Let B finishes work in \[2x\]days. \[\frac{1}{\frac{1}{x}+\frac{1}{2x}}=18\Rightarrow \frac{2x}{3}=18\Rightarrow x=27\]days
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