<PRE><B>Question 720260</B>
If it takes 9 guys to clear 6 acres in 1 hour
Find how many man-hrs per acre {{{(9*1)/6}}} = 1.5 man-hrs per acre
:
 how many guys does it take to clear 20 acres in 3 hours?
let m = no. of men to accomplish this
3m = 1.5(20)
3m = 30
m = 30/3
m = 10 men
</PRE>