SOLUTION: 10 men can dig a piece of land in 12days. How many more men are required to dig it for 4days?

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Question 1003642: 10 men can dig a piece of land in 12days. How many more men are required to dig it for 4days?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
10 men can dig a piece of land in 12days
Find how many man-days required to do the job
10 * 12 = 120 man-days
:
How many more men are required to dig it for 4days?
let m = no. of men required to do the same job in 4 days
4m = 120
m = 120/4
m = 30 men total required
But they ask how many MORE
30 - 10 = 20 more men