A) 23 days
B) 37 days
C) \[37\frac{1}{2}\]days
D) 40 days
Correct Answer: C
Solution :
[c] A can finish the whole work in \[20\times \frac{5}{4}\] days i.e. 25 days \[\frac{1}{5}\] th. of the work by (A + B) in 3 days \[\therefore \] whole work will be done by A + B in 15 days \[\therefore \] B's 1 day work \[=\frac{1}{15}-\frac{1}{25}=\frac{2}{75}\] \[\Rightarrow \]B shall take \[37\frac{1}{2}\]days to finish the whole work.You need to login to perform this action.
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