Over a minute most likely. I would say anywhere under 2:00 minutes would be exceptional for someone under 10 years of age. To give you some perspective, I'm a senior in high school, and right now I could probably run a 400 in 48-52 seconds. I'm an extremely fit track runner, or at least I like to think so. I've never seen anyone under 13 years of age run under a minute for the 400, and if I did, I would think they had a very good future ahead of them. So anywhere in the 1:00 to 2:00 range in good, but every child is different, so I really couldn't generalize and say, "This is how long it takes."
It depends on his/her age and how fast is he/she.
It depends on his/her age, how fast he/she is and the severity of cerebral palsy.
You didn't tell us how long it took to walk those 3.33 meters, so it is impossible to know how long 100 meters would take.
it would take 75 seconds
It depends on your speed.
It will depend on how fast each steps I take.
30 seconds
It would take 3.0857 seconds.
It depends on how fast you walk.
8.52 seconds
Average human walking speed is typically around 1.4 meters/second, so it would take about 17.86 seconds. At top walking speed, it would take ten seconds.
0.029