A) 10 days
B) 12 days
C) 15 days
D) 16 days
Correct Answer: C
Solution :
[c] (B+C)'s 2 day?s work \[=\left( \frac{1}{20}+\frac{1}{30} \right)=2\left( \frac{3+2}{60} \right)=\frac{1}{6}part\] Remaining work \[=1-\,\frac{1}{6}=\frac{5}{6}part\] \[\therefore \] Time taken by A to complete this part of work \[=\frac{5}{6}\times 18=15\,days\]You need to login to perform this action.
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