A completes a work in 4 days and B complete the same work in 8 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) 9 days	C) 2.67 days	D) 12 days	E) 13 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 = 4 × 8/ 12 = 2.67 days.   Answer : 2.67 days
<result>C</result>
A completes a work in 4 days and B complete the same work in 8 days. If both of them work together, then the number of days required to complete the work will be