Lindsay can paint 1/x of a certain room in 40 minutes. What fraction of the same room can Joseph paint in 40 minutes if the two of them can paint the room in an hour, working together at their respective rates? Choose the correct choice:  A) 2/3x  B) 3x/(x – 3)  C) (2x – 3) / 3x  D) 1/ (x – 3)  E) (x – 3) / x
Lindsey and Joseph together can paint the room in 1 hour   in 40 mins they can paint 2/3 part of the room.   Lindsay alone paints 1/x part of the room in 40 mins   Take Joseph paints 1/y parts in 40 mins   1/x + 1/y = 2/3   1/y = 2/3 - 1/x = (2x-3)/3x ANs (2x – 3) / 3x
<result>C</result>
Lindsay can paint 1/x of a certain room in 40 minutes. What fraction of the same room can Joseph paint in 40 minutes if the two of them can paint the room in an hour, working together at their respective rates?