Solving a Physics Problem: Calculating Time on the Ground & in Air

[usprince]

dear friends
i have a problem in physics please solve it

it is that a man covers 100 m distance by running...so calculate the total time by that he was in contact with the groung and the time that the time he remain in the air...

numerically
d=100m
t(on the ground)=?
t(in the air)=?

please try to solve n post

thanx in advance

 

[HallsofIvy]

You don't think perhaps his speed and/or stride has something to do with this?

 

[Hawknc]

please try to solve n post

Tell you what, you go first, then we'll help you out from there. You can't solve it using just the information you gave us, though.