A completes a work in 12 days and B complete the same work in 36 days. If both of them work together, then the number of days required to complete the work will be?	Choose the correct choice from the following options
A) 9 days  B) 11 days  C) 21 days  D) 22 days  E) 24 days
If A can complete a work in x days and B can complete the same work in y days, then, both   of them together can complete the work in x y/ x+ y days   Therefore, here, the required number of days = 12 Ã— 36/ 48 = 9 days.   Option '9 days'
<result>A</result>
A completes a work in 12 days and B complete the same work in 36 days. If both of them work together, then the number of days required to complete the work will be?