help!! part b please!!

Answer:
L = 0.5
as from the question, the formula is T = 1/L^3
therefore, T = 1/L
T = 1/0.5
T = 0.2
Hope it helped u, pls put thanks and mark as the brainliest ^_^
[tex]t \alpha \frac{1}{ {l}^{3} } [/tex]
[tex]t = k \times \frac{1}{ {l}^{3} } [/tex]
[tex]t = 1 \times \frac{1}{ {l}^{3} } [/tex]
[tex]t = 1 \times \frac{1}{ {0.5}^{3} } \\ [/tex]
t =8