A and B complete a work in 9 days. A alone can do it in 18 days. If both together can do the work in how many days?	Choose the correct choice from the following choices.
A) 6 days	B) 8 days	C) 5 days	D) 7 days	E) 15 days
1/9 + 1/18 = 1/6   6/1= 
<gadget id="calculator">6/1</gadget>
<output>6</output>
6 days   6 daysnswer:6 days
<result>A</result>
A and B complete a work in 9 days. A alone can do it in 18 days. If both together can do the work in how many days?