A) 8 days
B) 10 days
C) \[7\frac{1}{2}\] days
D) 7 days
Correct Answer: C
Solution :
To do the same job 'B' alone would take \[=\frac{100}{160}\times 12\] \[=\frac{15}{2}=7\,\,\frac{1}{2}\,\,days\]
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