Given that length of pendulum is 45 cm
Let T be the time period then the formula to find T will be
[tex]T=2\pi\sqrt[]{\frac{l}{g}}[/tex]Here, g is the acceleration due to gravity which is equal to 9.8 m/s^2.
Substituting the values, we get
[tex]\begin{gathered} T=2\times3.14\times\sqrt[]{\frac{45}{9.8}} \\ =13.45\text{ s} \end{gathered}[/tex]Hence, the time period will be 13.45 seconds.
