X can do 1/4 of a work in 10 days, Y can do 40% of work in 40 days and Z can do 1/3 of work in 13 days. Who will complete the work first? Choices:  A) D  B) F  C) X  D) Z  E) W
Whole work will be done by X in 10*4= 
<gadget id="calculator">10*4</gadget>
<output>40</output>
40 days.   Whole work will be done by Y in   (40*100/40)= 
<gadget id="calculator">  (40*100/40)</gadget>
<output>100</output>
100 days.   Whole work will be done by Z in   (13*3)= 
<gadget id="calculator">  (13*3)</gadget>
<output>39</output>
39 days   Therefore, Z will complete the work first. The answer is Z.
<result>D</result>
X can do 1/4 of a work in 10 days, Y can do 40% of work in 40 days and Z can do 1/3 of work in 13 days. Who will complete the work first?