Answer
t= 3.4 $\times 10^{-4}$ s
Work Step by Step
Given:
l = 25 mm
$v_{d}$ = 72.5 $\frac{m}{s}$
Required:
The time, t, required to traverse the given length
Solution:
t= $\frac{l}{v_{d}}$ = $\frac{25 \times 10^{-3}m}{72.5 \frac{m}{s}}$ = 3.4 $\times 10^{-4}$ s