A can do a work in 6 days , B can do a work in 8 days and C can do it in 12 days. B left work after 4 days. For how many number of days should A and C should work together to complete the remaining work ?
Choose the most appropriate option.
A) 0.1
B) 0.2
C) 0.3
D) 0.4
E) 0.5
b work 1/8 * 4=1/2   remaining work =1-1/2=1/2   a and c work together =1/6+1/12=3/12=1/4   take reciprocal 4 * remaining work =2 *1/4= 
<gadget id="calculator">2 *1/4</gadget>
<output>1/2 = around 0.5</output>
0.5   ANSW0.5R:0.5
<result>E</result>
A can do a work in 6 days , B can do a work in 8 days and C can do it in 12 days. B left work after 4 days. For how many number of days should A and C should work together to complete the remaining work ?