Answer:
0.4329 seconds
Step-by-step explanation:
We are given;
Distance; d = 0.635 m
Velocity; v = 3.22 m/s
Angle; θ = 62.9°
To find the time, we have to find the horizontal component of the velocity. 
Thus, Vx = 3.22 × cos 62.9
Formula for time is;
t = d/Vx 
t = 0.635/(3.22 × cos 62.9) 
t = 0.4329 sec
Thus the time he will take to clear the hurdle is 0.4329 sec