A can do a certain job in 12 days and B is 60% more efficient than A. The B can do the same piece of work in ?

A. $${\text{8 days}}$$

B. $${\text{7}}\frac{1}{2}{\text{ days}}$$

C. $${\text{6}}\frac{1}{4}{\text{ days}}$$

D. $${\text{6 days}}$$

Answer: Option B

Solution(By Examveda Team)

Ratio of time, taken by A and B = 160 : 100 = 8 : 5
If A takes 8 days, B takes 5 days
If A takes 12 days,
B takes $${\text{ = }}\frac{5}{8} \times 12 = \frac{{15}}{2} = 7\frac{1}{2}$$     days