Q37. 
12 men cam complete a piece of work in 36 days, 18 women can complete the same piece of work in 60 days. 8 men and 20 women work together for 20 days. If only women were to complete the remaining piece of work in 4 day, how many women would be required? 
A.  70 

B.  28 

C.  66 

D.  40 
Q38. 
$A$ and $B$ can do a piece of work in 10 days. $B$ and $C$ in 15 days. $C$ and $A$ in 20 days. ALL of them work at it for 2 days, then $A$ leaves. After 2 days of this, $B$ also leaves. $C$ will complete rest of the work in how many days? 
A.  50 Days 

B.  55 Days 

C.  67 Days 

D.  78 Days 