Mary completes a piece of work in 160 days, Rose completes the same work in 240 days. If both of them work together, then the number of days required to complete the work is? Options
A) 92	B) 94	C) 96	D) 98	E) 100
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.   That is, the required No. of days = 160 × 240/400 = 96 days   Answer is 96
<result>C</result>
Mary completes a piece of work in 160 days, Rose completes the same work in 240 days. If both of them work together, then the number of days required to complete the work is?