please solve

[dgordon]

If it takes 2 men 3 days to dig a 20x30 foot ditch, how many days would it take 4 men to dig the same ditch.

 

[Gene]

2 men take 3 days.
4 men would take half as long.

 

[Denis]

What's the purpose of asking that, dgordon?

Btw, it takes no time to dig a 20by30 foot ditch, since there
is no depth!

 

[dgordon]

thank you both for your help. I heard it on t.v., and it was boggoling my mind.