A) \[\frac{20}{3}\]
B) \[\frac{25}{3}\]
C) 6
D) 5
Correct Answer: C
Solution :
Part of the work done by A and B in 4 days \[=4\left( \frac{1}{12}+\frac{1}{15} \right)=4\left( \frac{5+4}{60} \right)\] \[=4\times \frac{9}{60}=\frac{3}{5}\] Remaining work \[=1-\frac{3}{5}=\frac{2}{5}\] \[\therefore \] Time taken B to complete the remaining work \[=\frac{2}{5}\times 15=6\,days\]You need to login to perform this action.
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