Amit, Bhawana and Chandan can do a piece of work, working toger in one day only. Amit is 5 times efficient than Bhawna and Chandan takes half of number of days taken by Bhawna to do same work. What is difference between number of days taken by Amit and Chandan when y work alone ?

	Amit	Bhawana	Chandan
Eff. →	5x	x	2x

$$\eqalign{ & {\text{Let total work}} = 1 \cr & {\text{Efficiency of }}\left( {{\text{A}} + {\text{B}} + {\text{C}}} \right) = 1 \cr & {\text{Then,}} \cr & \Leftrightarrow 5x + x + 2x = 1 \cr & \Leftrightarrow x = \frac{1}{8} \cr & {\text{Days taken by Amit}} \cr & = \frac{1}{{\frac{5}{8}}} \Rightarrow \frac{8}{5} \cr & {\text{Days taken by Chandan}} \cr & = \frac{1}{{\frac{2}{8}}} \Rightarrow 4 \cr & {\text{Difference of days}} \cr & = 4 - \frac{8}{5} \Rightarrow \frac{{20 - 8}}{5} \Rightarrow 2\frac{2}{5} \cr} $$