A alone can do $$\frac{2}{5}$$ of a work in 12 days. B is 25 percent more efficient than A. C alone can do the same work in 12 days less than B, D is 25 percent less efficient than C. If they all work together, then the work will be completed in how many days?
A. $$\frac{{300}}{{47}}$$
B. $$\frac{{240}}{{53}}$$
C. $$\frac{{180}}{{43}}$$
D. $$\frac{{200}}{{51}}$$
Answer: Option B
This Question Belongs to Arithmetic Ability >> Time And Work
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