36 workers can reap a field in 6 days. If the work is to be completed in 4 days, the extra workers required are Options.
A) 10
B) 25
C) 18
D) 15
E) 16
Explanation:   M1D1 = M2D2   36(6)=X(4)   =54   Extra required workers are 54-36= 
<gadget id="calculator">54-36</gadget>
<output>18</output>
18   Answer: Option 18
<result>C</result>
36 workers can reap a field in 6 days. If the work is to be completed in 4 days, the extra workers required are