In the construction of a house, some persons can do a piece of work in 8 days. Four times the number of such persons will do half of that work in :	Choose one:
A) 1 day
B) 2 days
C) 3 days
D) 4 days
E) None of these
Explanation :   Solution: Let x men can do the work in 8 days and the required number of days be z.   More men, less days (IP)   Less work, less days (DP)   men 4x : x   } : : 8 : z   Work 1 : 1/2   .'. (4x*1*z) = (x*1/2 * 8)   =&gt; z = 1   1 daynswer : 1 day
<result>A</result>
In the construction of a house, some persons can do a piece of work in 8 days. Four times the number of such persons will do half of that work in :