A, B and C can do a piece of work in 4 days, 6 days and 8 days respectively. How long will they taken, if all the three work together?	Answers:
A) 2 B) 4 C) 5 D) 1 11/13 E) 9
1/4 + 1/6 + 1/8 = 13/24 =&gt; 24/13 =&gt; 1 11/13 days   Answer: 1 11/13
<result>D</result>
A, B and C can do a piece of work in 4 days, 6 days and 8 days respectively. How long will they taken, if all the three work together?