Answer:
[tex]f = 4[/tex]
hope it help but will be more helpful if you give me brainlist, Thanks .
Explanation:
So frequency is calculated as
given
T=0.25
[tex]f = \frac{1}{time \: taken} \\ f = \frac{1}{0.25} \\ f = \frac{100}{25} \\ f = 4[/tex]
the SI unit is Hartz but don't forget your question of not including the unit .
