<PRE><B>Question 1088933</B>
There are 1500 men in a house and their ration is for 24 days.
1500 * 24 = 36000 man-days of ration available
:
 Five days later some people come and the ration survives for 12 days, then tell how many men had come.
:
let m = no. of additional men after 5 days
(5*1500) + 12(1500+m) = 36000
7500 + 18000 + 12m = 36000
25500 + 12m = 36000
12m = 36000 - 25500
12m =  10500
m = 10500/12
m = 875 more men came </PRE>