Question

The simple pendulum in a tall clock is 0.30 m long.

What is the period of this pendulum?

T = s

What is the frequency of this pendulum?

f = Hz

Answer 1

Your course materials should have included the equation for the period:
T = 2 pi * sqrt(L/g)

In your case, L = 0.30 m and you must know what g is.

Perform the calculation of T, in seconds. Then use

f = 1/T , for the frequency in Hz

Answer 2

Thank you DRWLS!