x men working x hours per day can do x units of a work in x days. How much work can be completed by y men working y hours per day in y days? Choose the most appropriate option:
A) x2/y2 units  B) y3/x2 units  C) x3/y2 units  D) y2/x2 units  E) None of these
Amount of work completed by 1 man in 1 day, working 1 hours a day = x/x3=1/x2   Amount of work y men in y days, working y hours a day = y3 × (1/x2) = y3/x2 . Answer : Option y3/x2 units
<result>B</result>
x men working x hours per day can do x units of a work in x days. How much work can be completed by y men working y hours per day in y days?