when there is no door ,no window. How to u know he was died.

You people really have went on wild with your imaginations. No doubt you all are good CA Students. He he !!

Yes, I did it!! Hahahaha!!

WELL HAS NO DOORS, NO WINDOWS,BUT HAS CEILING TO PUT THE ROPE FOR DRAWING WATER THE MAN WAS HUNG ON IT AND HE WILL DIE WITH THIRST AND HUNGER WHILE THERE IS PLENTY OF WATER ON THE FLOOR.

Since you have not asked how he enteredd in the room or how he make himself hanged fron the ceiling; you have only asked how the man is died so the answer is very simple...................................................................................................

He was  died bcoz of hanging. He could also die becoz of suffocation since there was no doors, no windows; hence no air to breath.

Now please could you clarify how he entered into the room. 

I told you that it is possible that the man didn't commit suicide. He was killed by someone else who sealed off the doors and windows after hanging him. It is not necessary that the man committed suicide, think like that.

why a man would take so much effort to seal the door and window etc after killing as in the course of doing this he would get caught and he would definitly would be in hurry to run away after murder!