arithmetic - kusuma does half as much work as vandana in threefourth of the time if together they take 18 days to complete the work how much time shall vandana take to do it - skillgun

Suppose Vandana takes x days to do the work.
Kusuma takes (2*(3/4)*x) = 3x/2 days to do it.
(Kusuma+Vandana)s 1 days work= 1/18
1/x + 2/3x = 1/18 or x = 30.