Question 1000551
 6 men finish one-fourth work in 2 days.
therefore
 6 men require: 4*2 = 8 days to do the complete job
and we can say:
6 * 8 = 48 man-days required to do the job
:
 The number of additional men required for finishing the same work in 2 days is:
let m = no. of additional men required to do the job in 2 days.
2(m+6) = 48
2m + 12 = 48
2m = 48 - 12
2m = 36
m = 36/2
m = 18 additional men
:
:
Check this, a total of 24 men working 2 days = 48 man-days