Test your maths!!! very short one, but very complicated!!!

Time taken by 3men to build a new wall 4 hours and 40 minutes.

Ignoring the Learning Curve Effect.

;)

Yup, the answer is 14/3. I think it's pretty simple. So I guess I under-estimated your capacity and capability! Hence I drafted one more question for you. It will be a real test for your maths aptitude. Try it!!! Gud luk!!

Click the below link for the question: 

  /forum/a-real-test-to-your-maths-aptitude-try-it-out--230962.asp#.UMilK-Q3vpw

how can u  say 4 40??if they r 60+ in age?