SOLUTION: Please help! I need to know the basic forumla to work out problems such as this: If it takes 6 men 9 hours to load a lorry, how long does it take 4 men? Thank you :-)

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Question 256890: Please help! I need to know the basic forumla to work out problems such as this:
If it takes 6 men 9 hours to load a lorry, how long does it take 4 men?
Thank you :-)
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
work can be measured in manhours (one man working for one hour)

it takes 54 manhours (6 * 9) to load the lorry

if 4 men did it, it would take 13.5 hours (54 / 4)