Your question is missing some information, so I will make some assumptions:

Velocity is 250 km/hr

How far will it travel in 1/100th second.

250 km/hr  x 1/3600 hr/sec  x  1/100 = 250/360000=.0006944 km=..6944 m = 69.44 cm

asinus (without login)

Hello Guest!

 How far will a tennis ball with 250 km/h in one hundredth of a second?

$\color{blue}Distance \ equal \ to \ speed \ multiplied \ by \ time.$

$\large{D= 250\frac{km}{h} \times \frac{1s}{100}\times\frac{h}{3600s}\times\frac{1000m}{km}}$

$\large{\color{blue}D=0.694m}$

Greeting asinus   !