X completes a work in 12 days and Y complete the same work in 24 days. If both of them work together, then the number of days required to complete the work will be ?	Choose the correct answer.
A) 8 days B) 10 days C) 12 days D) 20 days E) 40 days
If X can complete a work in x days and Y 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 × 24/ 36 = 8 days.   10 days)
<result>B</result>
X completes a work in 12 days and Y complete the same work in 24 days. If both of them work together, then the number of days required to complete the work will be ?