A) 48 days
B) 60 days
C) 75 days
D) 90 days
Correct Answer: D
Solution :
Work done by A and B in 10 days \[=\frac{10}{30}=\frac{1}{3},\]Remaining work \[=\frac{2}{3}\] \[\because \,\,\,\frac{2}{3}\]work is done by A in 30 days \[\therefore \] work is done by A in \[\frac{30\times 3}{2}=45\] days Time taken by B alone to complete the work \[=\frac{1}{\frac{1}{30}-\frac{1}{45}}=\]You need to login to perform this action.
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