A) \[3\frac{1}{2}\] days
B) \[5\frac{1}{2}\] days
C) \[7\frac{1}{2}\] days
D) \[9\frac{1}{2}\] days
Correct Answer: C
Solution :
A's 1 days' work \[=\frac{1}{12}\] \[\therefore \] B's 1 days' work \[=\frac{1.6}{12}=\frac{16}{120}\,=\frac{2}{15}\] \[\therefore \] B shall complete the work in \[\frac{15}{2}\] days \[=7\frac{1}{2}\] days.
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