A work as fast as B. If B can complete a work in 36days independently,the number of days in which A and B can together finish the work in?	Choose the correct answer:
A) 12days B) 3days C) 4days D) 5days E) 6days
Ratio of rates of working of 12days and B = 2:1   ratio of times taken = 1:2   12days's 1day work = 1/18   B's 1day work = 1/36   12days+B 1day work = 1/18 + 1/36  +  1= 
<gadget id="calculator"> +  1</gadget>
<output>1</output>
1/18 + 1/36= 3/36 = 1/12   12days and B can finish the work in 12days   12daysnswer is 12days
<result>A</result>
A work as fast as B. If B can complete a work in 36days independently,the number of days in which A and B can together finish the work in?