A) \[\frac{8}{15}\]
B) \[\frac{7}{15}\]
C) \[\frac{1}{4}\]
D) \[\frac{1}{10}\]
Correct Answer: B
Solution :
A' s work per day \[=\frac{1}{15}\] B's work per day \[=\frac{1}{20}\] (A+B)'s work per day \[=\frac{1}{15}+\frac{1}{20}=\frac{7}{60}\] \[\therefore \] (A + B)'s work in 4 days \[=4\times \frac{7}{60}=\frac{7}{15}\]You need to login to perform this action.
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