Question

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Answer 1

Answer:

see explanation

Step-by-step explanation:

Given

T= 2π$\sqrt{\frac{L}{g} }$

Square both sides

T² = 4π² $\frac{L}{g}$ ( divide both sides by 4π²

$\frac{T^2}{4\pi ^2}$ = $\frac{L}{g}$

Multiply both sides by g

L = $\frac{gT^2}{4\pi^2 }$