Answer:
I guess he was traveling 30 meters every second.
(Which is pretty slow to be honest)
Explanation:
This question doesn't really make sense since it says it right there he traveled 10 meters in 1/3 of a second. But I'm guessing that you want to find out how many meters per second.
Since 1/3 multiplied by 3 = 1
Then 10 multiplied by 3 = 30.
So, he traveled 30 meters every second.