A) 35
B) 36
C) 38
D) 40
Correct Answer: B
Solution :
In 60 days 210 men complete 1 work In 1 day they complete \[\left( \frac{1}{60} \right)\] work In 12 days they complete \[\frac{1}{60}\times 12=\left( \frac{1}{5} \right)\] work Now, \[\frac{4}{5}\] work is left for \[(210+70)\] workers = 280 workers Let the number of days be x. Then, \[280\times X=\frac{4}{5}\times 210\times 60\] \[\Rightarrow \] \[x=\frac{4\times 210\times 12}{280}=36\] days
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