A) 10
B) \[9\frac{3}{8}\]
C) \[8\frac{4}{5}\]
D) \[7\frac{1}{2}\]
Correct Answer: B
Solution :
[b] Total time taken by A=15 days Total time taken by B = \[\frac{10\times 5}{2}\]= 25 days \[\therefore \] (A+B)'s l day's work \[=\frac{1}{15}+\frac{1}{25}=\frac{5+3}{75}=\frac{8}{75}\] \[\therefore \] the work will be completed in \[\frac{75}{8}=9\frac{3}{8}\] days.You need to login to perform this action.
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